Just some quick thoughts regarding PTR Patch.
Ana nerf definitely but it's not enough for sure. In no way is it going to shake the meta with just that 50% change. What it does do is Ana no longer resets fights for tanks in a second, which is good, but far from being sufficient. Heal block is definitely the stronger aspect of her grenade. It's still going to be regardless unless the radius is reverted (which I don't see happening), or the heal block gets nerfed to 50% or whatever. She's still in the strong position of 90+ usage pretty much. They have yet to address how strong her base kit is as well too.
D.Va nerf idk I think it's too early to tell. Some people say she's trash now and what not. I don't think it would be that straightforward. The problem with Live D.Va is that her power level is really high especially with Ana where she can contest with Zarya for a spot on the team. A more appropriate power level for D.Va would be to make her comparable to Winston. They are both aggression tanks where Winston is better at cleaving and D.Va has duality by being able to be useful while still with her team. Live D.Va is basically just better than Winston for the most part. The changes would probably make her even more heal reliant than ever, and she's already the most heal reliant tank to be effective. I think there's still a good chance she'll still be useful, just not omnipresent like she is now, which is a good thing. The bad thing is well less things to zone S76? I never quite liked the damage buff S76 received and we might be able to see the effects of that buff more if D.Va declines in usage.
Hook 2.0 idk haven't played with or against it yet. Some people dislike the idea that you can dislodge the hook if you manage to hide before the stun takes into effect. Some call it a straight up nerf and I can see why. Other people call the more consistent OHKO with M1 a buff, but imo it's just also a fix so players don't need overly complicated techniques or whatever to secure a kill. I am personally fine with the hook change but I'm surprised they probably didn't do anything regarding hook hitbox, unless they stealth changed it then 9.9 patch notes pls. Is being able to juke hook after getting hooked a good thing? This is something that's very subjective and comes with the design problem that is Hog. At the current state, Hog is a really badly designed hero who is a fat mid range bodyshot sniper that shoot buses, not a tank, whatever. Just exactly what I said. The game wouldn't lose anything of importance if Hog gets removed but that's just my very biased statement :p By being able to juke hooks after getting hooked, it indirectly changes the purpose of Hog. You can't punish people who poke you around corners or obstacles as much. This removes Hog from being in the sniper archetype that he never should have been. this changes his purpose to punish people who stay in the open for extended periods of time, similar to S76. Still overall a dumb hero concept but less dumb. I don't think it's a bad thing having Hog go from a sniper to a zoner which is more appropriate.
Sombra Hack change, idk feels unneeded but I don't hate it. I don't have difficulty hacking heroes since I generally either hack from above or behind. At pro level they'd probably have enough awareness to be able to do something about it I guess. It's a w/e change but it'd make hacking from the front easier, especially with bad aim.
Most importantly though, more emotes and voice line slots :D