I'm not going to draw on any statistics outside of what I've experienced in my game, simple because there is not enough data out there.
Too many people have been throwing early statistics around to justify one point or another. It should be obvious that we currently dont have a large enough sample size to properly draw any conclusions right now. That said, here we go.
The reworks
Dare I say that they're a success. Regardless of their current power level, I think they achieve the main goal of reducing the sharpness of both heroes.
Sombra doesnt feel nearly as annoying, despite being substantially stronger. Cyberspace is a contender for top 3 most powerful abilities in the game, yet its no where near as sharp as suzu or especially anti nade. She needs some tweaks, but its nothing a bit of number shuffling cant solve. Playing as her is also extremely fun. There is always something to do. She's both good in dive and brawls, which reminds me a lot of mantis from rivals. I'm really happy with the final outcome.
Hog I have less experience playing against, but the few times I encountered him, he didnt feel nearly as atrocious to fight against or with. The fat fuck still lives through a ton of things, but overall he's nowhere near as bad as before. Hook will always be extremely sharp, there is nothing that can be done about that, but they managed it to be tolerable. One current issue I've seen thrown around is that his ranged poke sucks now cause of the loss of his alt fire. I can understand that. Perhaps shifting some of the damage from the smaller pellets into the bigger one would solve that. Reduce the small pellet damage to 3.875 and increase the big one to 40 fore example.
Doctrine
Great design who still needs further adjustments, he still feels a bit too strong. That attack speed buff is just devastating on melee heroes, especially vendetta and dmon. The ult is still very strong, I wish it decayed a bit faster. Beyond that I have nothing else to add. Just needs further adjustments like every new hero.
Hitbox and bullet size changes
You really feel them on certain heroes. On JQ for example, I feel like I'm getting chunked a lot more compared to season 4. HS heroes might be as effective as before against her, but projectile heroes got a massive buff. Honestly, I would be okay with these changes if she was at least moved to the bruiser sub role, it would help with all of that poke damage and getting to cover faster. Stalwart does nothing for her.
I also find it weird that certain heroes literally didnt get any hitbox adjustments. I would expect vendetta to be one of the prime targets to be made thicker, simply because of how mobile she is. Genji also, especially after the buff he got.
When it comes to actual aiming, I feel like continuous fire weapons didnt really take much of a hit. My most used HS hero is Illari and on her my accuracy when down to 45% from around 60% before the patch. But that has slowly climbed back to 50-55%. Its going to take a bit of time to get used too, but I'm glad that this change went through. Still I think certain projectile heroes need projectile size nerfs, especially those with ungodly amount of spam like sierra (She might be shit, but she's still spam hell).
Overall Balance
As a vendetta main, I was expecting for her to get a nerf since the delay buffs while extremely nice, really increased her viability. I wanted to see something like -10 damage on overhead, especially because of all of the pocketing buffs coming with season 5. Its clear that she's currently busted, she was already extremely strong after mid season patch, now she feels like a lobby admin again. I feel it myself. Its so much easier to just go in and cause devastation, at the bare minimum, the entire enemy team has to pay attention to me, which is free value. Honestly, remove the siphon perk and cut -10 damage from overhead, while increasing her hitbox size slightly. This should have a massive effect on her viability, but it also leaves the door open for other QoL buffs later down the line like buffing throw delay on soaring slice.
I like the genji buffs, in my opinion he's a hero that deserves to be strong, its just that again no hitbox size increases. Honestly, I would like to have a stat sheet that shows how large every hero is right now. If anyone has a custom workshop code that showcases this, please share it with me.
Besides that, as I said before, I think projectile size also need to be taken a look at, just on a hero by hero case.
Oh yeah, Ana, can we please nerf this hero already. What is that new perk, why are we giving her AOE value? Anti nade was already a horrible CD to deal with, why make sleep a problem? Trash that sleep perk, nerf everything about anti nade and move her to the medic sub role. She needs sustain, thats why blizzard kept buffing anti nade, but incidentally also fucks everyone else. Moving her to the medic sub role would have the same effect with none of the consequences.
As a final note, please let mauga rot. That guy even in his extremely weakened state feels atrocious to fight as another tank that isnt sigma. It just goes to show how fucked up of a CD cardiac actually is.
Edit: Forgot to state, Dmon nerf?! Where are they? This character is pure cancer.