The difference between XvsX and RvR is imo, that in RvR you have goals to accomplish. Ideally RvR forces you to think more about strategy (how to take the enemies targets and avoid getting yours taken) in a more global scale. Unfortunatelly mythic dumbed this concept down, as they removed several features from RvR (guild keeps, fortesses, etc.).
The big goal in endgame is it to raid the enemies city. It should be exceptional and the ultimate win, but with the removal of the fortesses it just became common and boring (before removal ~ 1 city raid per week, after removal 5+ city raids per day...).
So RvR is a mixture of thinking about your personal strategy (buttons to press, people to protect, etc.)
and a global strategy (the next goal for your realm).
Mythic also dumbed down the idea of "realm pride" when they made crossrealming easy available. I think there are more people that just relog the side that is stronger atm (instead of fighting as the underdog), as there are people that log on the underdog side to balance the numbers and make everything worse.
To the "how to solo somenone" point:
WAR has a "rock, paper, scissors" idea of class balance, but it is not like "hard, oldschool" RPS; more like a loose concept (e.g. tanks in WAR have selfheals, mdps have possibilities to avoid the high armor and defense values of tanks, etc.).
The basic concept of this kind of balance, is to work together to compensate each others weakness(es).
But there are also classes like WH and WE, that attack from a position of strength in every situation. If you want a class that is good for soloing and has value in a group setup, you should try one of these two. Or just make a marauder...
See also
Hammerwiki PvP
Imo the "rock, paper, scissors" idea is the best for every mmo. When you compare it to the boredom of GW2 and ESO, where everyone can do everything (more in GW2 as in ESO), i realise that i never get tired of it. "Rock, paper, scissors" creates a much deeper gameplay experience, than these two games (for example) will ever achieve.
Additionately WAR is one of the few mmos, where tanks have a real concept and are worthwhile in PvP, as they have a broad range of abilities to protect other people. In most modern mmos it's normally a boring dps vs dps concept, with some (dumbed down) healing abilities thrown in.
WAR is not boring like other mmos and because of this, it will last very long (until the devs stop dev-ing
).
