I wrote 3 articles on mesmer:
Based on beta: http://guildwars.incgamers.com/blog/...-beta-coverage
Based on reveal: http://guildwars.incgamers.com/blog/...er-has-evolved
Compared to thief: http://guildwars.incgamers.com/blog/...esmer-vs-thief
That does not make me expert, it makes me very vocal hahah! But at least there you can see what I think of the mesmer.
But when I hear that there is no hexing or interrupts or degen, and I actually see the profession having those... I get into argument mode. But it's so that people don't dismiss what might be something they can learn to love. ;)
For me at least mesmer was not an instant love, and GW1 mesmer is still love/hate mainly because I am not very good at it. I love what the GW1 mesmer does though. I think for many, mesmer gameplay was something that grew on them as they learned the profession, rather than be instant love.
Perhaps the GW2 mesmer just needs a chance to grow on you.
One difference might be that a clone attacking can be defended against, which means that what whereas we couldn't dodge or prot against a hex in GW1, we can in GW2. If that really bothers you, then that is a valid concern. But it does not bother me.
As for interrupting, I've done it on an engineer, and mesmer can do it too. It's harder to do than before, sure. But you can interrupt by KD, by stun afaik (which 1 shatter on mesmer does) and there may be more ways perhaps even a mantra or optional skill. I don't honestly know how much you can specialize in interrupting, but I doubt it's a lot. But it's one thing to say "interrupting is gone", another to say "specializing in interrupting is limited" or "interrupting is harder to do".