Alright, while I appreciate the changes made to zenyatta, they didn't really address his main issue. He's still far to easy to kill. The changes to his HP being mostly shield now means nothing because if someone is targetting zenyatta, the odds of you being able to escape damage long enough for it to begin refilling are pretty low. The buffs are nice, but I doubt this will effect his place in the meta very much.
D.VA buffs are super nice, but she is still stupidly easy to crit.
Mccree buff is nice and was totally needed.
Ana is an amazing hero by the looks of it and might make lucio even more useful because his aoe healing will get a massive buff in hps because of her biotic grenade. And her ultimate will be freakin' amazing for heroes like pharah and 76.
Also the sleep dart is not all it's cut out to be, As ANY damage will instantly wake the foe up, so only a hero like 76, junkrat, or pharah will be able to take advantage of it with their large burst damage.