so I feel some things the same and want to write my opinion and some suggestions.
First I have to write I enjoy this game very much. There was no other game I enjoyed like this (played WOW 9 years - there very many and many... so many things were made just to steal your time). But there are few things in RoR which... devs should consider maybe.
Been here about 7-8 months, my first char was a SW (RR 50+) and I decided to switch (have BO almost RR 60, Choppa RR 40+, Sorc almost RR 50 and lvling a DoK) because I saw destro loosing more times and I like the greenskins look in this game (and was a "horde" player in WOW). I made the SW only to try to play for the other side

I have to say that this is only my point of view but still I will try to be objective.
1) Yes, xrealmers and switching sides during open RVR fight is a problem. I think this is pure community problem and will never be solved to make the situation look we wish. I tried to think about it a lot - maybe devs could make a "buff" like quitter or something like that on your characters of oposite fraction. Example: You are in the open RvR for order and your siege falls (or your deff falls), you will get the quitter buff for 20 mins (it could be more/less) on your destro characters and you can´t join/enter this RvR zone - you will become a "chicken". Or you could get this "buff" if you fight in the zone for more than half our or so - this is only expamle. But what I want to say is - players always could make their own choice, they could create new acc and have destro characters on 1 acc and order chars on other acc. It could take SO MUCH time to try solve this problem and it could be contraproductive (players could leave the whole RoR game).
2) Scenarios. This part of game is awesome. But I realy enjoy only t1, t2 scenarios. The low lvl boost in t1 and t2 scenarios is a thing! But the boost in T2 SCs is a bit OP - see low lvls on highest places in ranking table almost everytime (so it is a bit frustrating to see the fact - higher lvl you are, lower dmg you deal) I understand why is it so (it is a compensation of missing spells). I got it, but maybe lower the boost just a little bit. Just my opinion, suggestion, not complaining. I dont write about t1 boost (maybe is it the same ratio) because you can get 16 lvl very fast. As I said t1 and t2 SCs are fun!

The main problem starts on 31 lvl. It is hard to have the impact on the game when you have to head face to face to 40/40+ players. There are pros of course -
pros for low levels players: you can get more RP and XP if u win and you can lvl very fast (if u have luck and have a big 40/40+ brothers on your side).
pros for high RR (40/40+) players: you can enjoy big crits and big impact on the game.
And cons -
cons for low lvl players: low impact, fast killed, the squad is a bigger lottery (you can face to a realy good and equipped 40/40+ players and you can do nothing).
cons for high RR players: low RP.
I dont want to break and split 31-40 SCs. So the solution could be to have the possibility to join 31-39 SCs and 31-40 SCs too. There is a question if it is possible to make something like that (technically)? Example - we can join few 31-40 scenarios every week like Stonetroll Crossing, Phoenix Gate, Black Fire Basin, High Pass Cemetery... so why not do one scenario for 31-39 too?
It could be nice to have the option.
3) Keep deffend reward. To get the high RR players motivated to deff keep - chance to win reward like epic/rare talisman lootbag or something like this (after successful deff). There was a sad situation week or two ago - " big keep deff in BC"! Many of us remember - some players wanted to go fort and let the order win and some not. I don´t want to go back and write about it again.
4) Class balance. Here we are. I won´t write about hate or blame... I repeat I want to be as objective as possible.
As I wrote I have experience from both sides and I have to say, yes there are few things which should be repaired, considered. Things that have the biggest impact on the game (open RvR zones, Scenarios).
a) pet of the white lion. This is the most annoying problem in the rvr for me and I see that this is big problem for the others too. It is a chasing machine you cant escape (even if you should - breaking textures, flying...). Even the lion can knock players down... the impact is huge. WL is the strongest char for soloing (independent of RR), no doubt. Me as a Sorc... even WH doesn´t kill the me so fast (and WH is class made especially for killing clothies). But I am ok with dmg of WL. WL is realy strong but I suggest to all players asking for nerfing the WL to think what could be the WL without his power in close combat? Try imagine that WL is nerfed too much - so be careful about changes. I like challenges (don´t like bugs), but the pet is a problem (and sometimes I lost the patience with SCs and jumping WLs and their pets and closing the game... yes I am only man too). But strong 1vs1 dmg is all he has, so I understand and please dont nerf him. Just repair his pet in the future.
b) Sorc backlash. Idk about BW, maybe is it the same. While playing a Sorc I am getting the backlash even if the spell is disrupted or blocked. And the whole backlash is very big. I think it is no very balanced compared to other classes (just for expample - WL or Mara can have big dmg burst without any penalty, but sorc pays very big price for the burst, I ask why?). I damage myself for 750 dmg for one disrupted curse? Does not sound very fair. Not complaining, just... it is a fact.
c) Kotbs - I realy do not remember I was ever heading to such a "strong wall" while playing for order (in scenarios especially). As I named the WL "killing machine", Kotbs is "impossible to kill". I do not know if we have something like this on both sides, but... I like them, because it is a challenge, but.
d) Ranged SW/SH - I played only for SW, but tried the SH and it is almost the same. SW realy has no burst to kill. SW was my first char ever and wanted to play as ranged dps. I was surprised It could be long story here, but I have no idea, no right proposal. Just pointed out. (engineers are so powerful, magus too maybe).
There are maybe few other things I don´t know right now, I forgot maybe. I have to say big thank to all devs who are working on this game. It is very kind and hope you will have the time, patience to keep the perfect work. Thank you for this amazing game.
PS: Sorry for my bad english, hope the point is clear (if not, you can ask of course)

Have a nice day.
Urshark