I see some people bring this up and say the devs just forgot… but when I read this it seemed obvious to me that they were talking about the Rocket Punch vs DVA/Orisa interaction. The one that the original OP clearly brought up…
That itself sounds like a bug. Orisa being punched out of Fortify and DVA in general should be knocked back like every other hero.
That doesn’t make me believe that every boop in this game should knock them back. Doomfist’s RP is different.
Having said that, I don’t see the issue really with Orisa and DVA having cc resistance while firing. The idea clearly seems to be that unlike every other hero Orisa and DVA lose the ability to strafe, jump and move quickly as they enter their fire mode. They get debuffed with slowdown but also hold their ground a bit better (In Orisa’s case, she throws out an almost endless supply of bullets and DVA has an infinite clip size). Sounds like a clear balance decision.
As Wrecking Ball and Lucio, I have few issues with that. Booping Reinhardt makes a ton of sense but using it on DVA doesn’t sound perfect unless you out play her and catch her after she boosts and while she uses her DM. For her, I would instead look to my beam heroes to wreck her defenses rather than expect something out of my knock back heroes.
People hate mobility. People hate CC. I am really curious what people want from future heroes outside of those two things, especially considering that we’ve created nearly all the FPS trope weapons already.
Another Barrier hero? Another Sniper? Another Soldier? Another burst healer?
I am pretty sure that most of those future 6 heroes will have either…
- CC
- Mobility
Because in the end, as long as every Tank/Support/Damage contributes different levels of Defense/Heal/DPS, we will always need utility skills to help balance them out.
- Mei does less DPS but she has great self heal, CC and wall utility.
- Hammond doesn’t block damage but he has excellent disruption skills and CC
- Genji doesn’t self heal but he has excellent mobility.
I am genuinely curious about what other routes we could take outside of just remaking the game. 
Zarya’s 2 second barrier aside, it seems like she is the only off-tank that is resistant to “pit maps” so I don’t see the issue. If anything, it just sounds like her being a common hero comes down to us having only 3 Off-tanks and Roadhog being far from meta. We need more off and main tanks. Even if the META is against her, it isn’t like there are a ton of other options for people to choose.
Hog only gets 1 main tank that he melds with (Orisa) and the both of them are out of META – until we have more options, DVA will remain, nerfs and all.