Yes!As in she's too survivable?
Zarya's fine, she just is a character that is very dependent on the rest of her team sticking with her. Whenever I'm getting shot up as her and my personal barrier is on cooldown, my first instinct is to look behind me, find a teammate, and stick a barrier on them and hide behind them. If you're lucky, you've got a team that sticks with you and knows that this means, "Draw their fire while my barrier recharges!" When you're unlucky, like I was in a match tonight, you look behind you and realize that everyone else is either respawning or off in skirmishes away from the point. And then you die.
Had a special kind of pain tonight: had a teammate pick Torbjorn on a KotH match, he was absolutely terrible even in the context of "Torbjorn on KotH," and his user name was in Korean, so me and the rest of the team complaining about his uselessness were probably not even understood. It's a miracle we actually managed to go 1-2 on that one.
Apart from Junkrat being able to do absolutely nothing against her (seriously I could hit her with all 5 grenades and a mine and still she's up because of the barrier), with Mercy, you can easily see 4 or 5 heroes on the other team try and take them on and fail. I've seen Zarya take on 3 people for a good minute with straight back and fourth on multiple occasions. That's just ridiculous when her damage is as great as it is.