I get that and heroes like doom are frustrating as they have a bit of that but a lot else going for them so Blizz will make the effort more and really fight to get them in the game. I bet Sym mains even look at Sombra and Torb with envy!
Thing is each of those heroes have a reason holding them back, like Sombra’s sucking away at player control.
Sym is all I said in my last post of just stuff that’s kinda annoying and kinda boring to play so shouldn’t be made good but also core to her kit and character so is difficult to change.
Bastion is just making a super strong wall and the game about breaking that, which isn’t that fun for either side (also have you seen bastion mirror matches, they are the dumbest thing in the world and no one wants to see that be anywhere near meta)
Junk has a very RNG projectile where it killing you is largely down to how lucky you got. It needs high dmg to do its job (barrier busting) but there is obviously a limit as it cannot go over 200 dmg (remember stuff like Mercy dmg boost means it has be actually be below that and its basically topped out already) but the dmg also means it has be slow and inaccurate. That’s a really hard problem to fix.
Also to add to your 3 Moira’s thing and niche is she has huge heals and good dmg potential for a healer but nothing else besides an escape. That lack of utility really hurts her but let her dmg or heals go up to compensate and she just goes nuts, leaving her kinda stuck.
Torbs main utility is something that’s totally automatic outside placement (Sym also has this issue) so making it (or the rest of him) good feels cheap for everyone else and bad feels meh for him.
Brig has healing, dmg and tanking potential, if she is good at all of them she is stupid OP, so she has to be kinda bad at all of them which means she sucks in 2-2-2.
Hog just sucks as a tank and the stuff that could make him better without radically changing him all would work better on a DPS and not improve him as a tank. To do that you’d have to change who he is and we like who he is, even if its bad. They could change him to a DPS but tanks are thin on the ground as it is and it would be a big job to change his role.
To round it out (as I’ve talked about Mei and Sombra already) Orisa is just a fairly boring, rinse and repeat playstyle, which many don’t find as fun as her rivals. She has however already got so much utility with her barrier, fortify halt and ult (not to mention her gun is rather good) that they can’t buff any of it without making her too strong, let alone adding more to make her more dynamic.
They can fix this stuff, Dva DM was a big problem that’s largely fixed. I may not like it but Reaper has a good spot now. Old hanzo was trapped as a projectile sniper so why ever pick him over Widow, but they have got him useable now. Even people like Junk and Torb have had their moments. Its difficult and often takes a lot of work and reworks. Plus the whole balance (particularly for DPS as there are so many of them) is a wheel and one gets be on top forever. I wouldn’t lose hope for these heroes but I wouldn’t hold your breath either.