It's more that roles have been turned into actions and mechanics. People struggle to understand that and say stupid shit. Then it's pretty much a L2P scenario.
When has this
not been the case in MMOs? The distinguishing factors between classes within a role has
always been actions and mechanics.
An example is an Ele dropping a water field inside a dungeon. The ele then switches to Earth and blast finishes to heal her group, but then a warrior and a engineer blast finish as well, creating an aoe heal that involved the teamwork of three people. It's a new system to understand. Most get by not learning the system and claim its just pure chaos. They just removed rez rushing from dungeons and people who have been doing mindless chaos are going to get stuck while the people that learned the game will just have some more challenge.
It's not a new system. FFXI did something VERY similar with skillchains. The difference being you still had loosely defined roles and skillchains were reserved for damage dealers.
I don't have anything against the trinity, but it's pretty much reached the ends of what you can do with it. I was getting pretty tired of the same song and dance. There's more people want to see in a fight. More concepts and things to do that you can't with a trinity because you have to have the tank and healer, and those jobs can't be abandoned in a fight. Encounters in GW2 are a lot more active. You can't macro it while you watch TV. People who are used to more lax play will either adapt to this and learn, struggle and quit, or struggle and resent it, but the thing is that general PVE is doable enough without learning the depths of combat, so I imagine many hit 80 and don't fully gather in the depths of the combat and just dismiss it. It's not a badge of honor thing. It's that people have been stuck in the same behavior for years and have to get out of that behavior to understand what is fully going on in GW2. A lot just don't do that.
Reached the ends of what you can do with it? The entire MMO genre is stagnant as fuck right now.
Again with the same "trinity = easy, you just don't
get GW2" strawman that the GW2 hype train rode in on back in beta before it fell off a cliff. The "depths" of combat have exactly dick all to do with trinity or no trinity.
I do find it interesting that some people are struggling to make connections with other players without the dependency of the trinity. It's like they're left to their own social skills to interact with others and don't know what to do. Before, perhaps they were an invaluable tank or healer. By healing people needed them. This is how they made social connections. Now they just have to be good at their class and be able to converse with other people in an adequate fashion. Certain players are struggling with making friends without the threat of "I won't heal for you" looming.
That's really not the point I was making with regard to the social aspect of the trinity. It isn't a "dependency" or looming threat of "no heals, no tanks". It's the same separation of concerns that enables any team in any environment to work effectively.
As for WoW not being outshone or that people aren't enjoying the game, all I can say is lol. Rift outshone WoW in many ways in doing WoW but with more and more attention given to what people want. WoW isn't really top tier quality stuff. It's just got wildly popular at the right time. GW2 outshines WoW in every way and then adds more on top that just isn't present in other games in the genre. GW2 can be improved upon itself and I'm curious to see if others do so or ANet just improves it themselves.
I see. It isn't "good". It's just "popular". I've certainly never heard that argument before

.
Look, I don't play WoW anymore. I certainly don't like the reduction to simplicity that they've been focused on the last several years. I applaud ANet's ambition and intentions, but I just don't think GW2 is that "next" step that it was lauded as prior to release and still is to a much lesser extent now.
Apparently more users = better 
We were just having an argument about more users = better in the context of Guild Wars 2.