I don't like losing control of my character. It completely killed WoW PvP for me.
But I think there is a difference between CC. There is a different between being KD'd for 2 seconds, and then being rooted by a druid for 12 seconds while 3 people hack away your health.
There is a difference between being feared for 10 seconds, and then being crippled for 5 (where you still have your movement of your character and still can attack). I just don't think you should lose completely control of your character, and I am interested in seeing what will happen with Revernant getting taunt.
Maybe Warrior will get some sort of taunt ability as well?
Personally, I feel like you need CCs. They're a valuable way to interact with your opponent that isn't just more damage, or just another type of damage. They can be used to set up kills, but more importantly they can be used to save lives. In TF2 you could knock opponents with certain attacks to screw up their aim, and the fact that most weapons had some amount of knockback was something specifically designed so that all attack pressure had some varying amount of CC pressure to help allies. Also, because it can be fun to throw people around and (at times) be thrown around.
And GW2 takes it one step further by also including anti-CC abilities. Stability, (soon) Resistance, Dodges, and Stun Breakers. There honestly doesn't feel like there's much to fear, and on the Revenant we can already see Taunt is being treated carefully by consuming a large amount of their resource mechanic and also CC'ing the user along with the target.
Wait, can anyone tell me if Resistance only prevents damaging conditions?
What concerns me the most right now is the idea that people who pick an elite specialization will be stronger in PvP and WvW than someone who choose to remain in their base profession. I think it is really important that people can remain competitive by still choosing to remain a Mesmer or a Ranger or a Guardian.
But what are you giving off by going Chronomancer? You get another F skill, you can still use all the weapons. Unless you got some crazy synergy build that has no points for Chronomancer tree, will people choose to remain Mesmers?
You can even be a Chronomancer and not invest in the tree? I think that would be weird. I think your class should only change to a elite specialization if you're actually picking a elite spec as one of your three specs.
The other reason for this is that it was a cornerstone of GW1 that ArenaNet did not try to shoehorn people into buying the expansions to GW1. If the new professions, gear and skills were more powerful, players would feel forced to buy the expansion. Instead the horizontal levelling was kept in place to make sure that it stayed true to the Magic The Gathering form of balance. Having more choice (like an elite spec) is an advantage) but it's not more powerful. having more choice doesn't mean you're dressing for the right ocassion if you pick the wrong build, gear, skills and so on.
Both DragonHunter and Chrono look really powerful. I know some people will not do it simply because of personal reasons, but I really hope that power-wise, people won't feel disadvantaged by staying in their base profession.
Even in Magic the Gathering, even if you kept with the really strong old stuff, the new stuff would often feel stronger and people would feel the need, real or imagined, to get on the new stuff. Metagames would change as the new stuff would have certain weaknesses but do new things or old things more efficiently (perhaps related to the theme of the expansion).
So, that's what I expect from Heart of Thorns. Either some builds will be more dependent on the base game traits and can't fit the elite specializations, or certain builds will use a certain number of base game traits to counter the elite specializations. There's also the fact that something like the Chronomancer will be harder to use and potentially more catastrophic if you mess up. Wells are still easy to dodge without a certain degree of CC and Alacrity needs to be maximised to be worth it.
But hey, I'm probably also not worried because I'm planning to buy the expansion anyway, and anyone who's even semi-serious about competitive PvP play will need to buy the expansion just for the horizontal options. PvE players will have to buy it anyway to get to the new zones. WvW players will likely get it for the same reason as PvP players, although they have the least reason to, the lucky dogs.