Wow, such eloquence. That was enlightening (read in sarcastic).
Now, joke apart. I can't talk about Magus, engie, chosen, kotbs, sw and sh. I don't play these classes. On the other hand I do play Slayer/Choppa and AM/Shaman. Addressing the OP would be pointless because other ppl already explained very well why it is just a biased rant. I just would like to point out a couple of things that the Order lobbyists here are not saying, though out of ignorance or malice I can't say.
Choppa-Slayer
Slayer had the monopoly on Order melee choice for 15 years. It was literally the strongest class in the game. Choppa was by no mean as strong as Slayer, both in solo and in party/wb. There are a lot of "famous" solo Slayer, but there aren't any famous solo choppa player. This is because solo Choppa was not a thing, it just didn't work as well as Slayer. What made Slayer so strong was Rampage. The skill needed to be toned down. It ignored morale, it made guarding a DPS counterproductive, and it made the whole tank archetype a joke. And order defended their right to have the skill with nails and theef. The knew they had a privilege but no one wanted to acknowledge it for fear of having it removed. The skill was toxic.
Choppa used to have more utility (GTDC, Chop Fasta vs Shatter Limbs) while slayer used to have more damage (ID and Rampage). Now the two classes have the same utility (no more Chop Fasta) and Choppa damage was buffed on par with Slayer. But Slayer still have Rampage, while Choppa, in the same tree and for the same Mastery point, have a nice pile of garbage. So, no. Choppa is not better than Slayer
Shaman-AM:
Is Shaman immortal in 1v1? Yes... If heal spec. Just as much as every single other healer. Healer shouldn't die to 1 single DPS attacking them. And if they do, it is because they fuked up. DPS shaman is not immortal. Shaman have great mobility. It have 3 kiting tools (punt, puddle and Run Away) and that is by design since Order has WL which have 3 gap closer (pounce, pull and charge). You want nerf shaman mobility? Fine, then nerf WL mobility also. DPS Shaman is worst than DPS AM. Heal Shaman is worst then heal AM. As a healer you have the same healing skills but then Shaman have worst morale pump, worst AP drain, worst puddle, worst M2. Shaman is just plainly worst than AM. Shaman received only nerfs since the beginning of RoR. They nerfed puddle, auto detaunt, run away, lifetap, AP drain and Gork's (or Mork's? Can't remember) Touch (now called Hurts, Don't It?). They even broken the class mechanic. And you know how many buff received Shaman? A big fat 0.