These are very good thoughts
I don’t want to police you, as a game designer, but in my opinion games do better when buffs are prioritized over nerfs. Buffs keep everyone in line by ensure there are options to counter other busted units of strategies. Nerfs do their job but can have the unintended side effect of crippling existing counters to other strategies that are now OP.
I used to play a tf2-esque shooter called Plants vs Zombies: Garden Warfare 2. It is different as Team Plants has a different set of characters than Team Zombie. It was asymmetrical. Balancing is much more difficult and it shows. Imagine if every single tribe was a special tribe with different units, and a nerf on one tribe did not impact the rest like a nerf on the swordsman would impact all tribes.
When pvzgw launched in early 2016, Rose on plant team was considered overpowered, but in my opinion there were a myriad of design problems regarding the zombies that she kept at bay by being broken. It wasnt good, but it was something.
Particularly, a the superhero zombie class had a variant (Electro Brainz) that allowed you to shoot at a plant player, chain the shot to someone else, and end up dealing more DPS (In the hundreds, where the average health of a character was about 130) to the nearby plants than the one you’re actually shooting.
The superhero class is also supposed to be a mobile, close range brawler with the beam only serving to tickle enemies at mid range and prevent wounded ones from escaping. Not a distance shooter. But this is how most folks played him.
This strategy is what kept the rose from completely ruining the game. But by nerfing her but not the zombies to keep them in line, the game was an exhausting gang-bullying simulator from February-June of 2016.
They solved this not by nerfing the zombies (Aside from Electro Brainz, his interaction was a bug) but by buffing most of the plants, including lesser used ones. Allowing for more fun and engaging gameplay.
Basically, when everyone’s super, nobody is.
This 9 minute video (Albiet, using Fighting Games as a base) explains my thoughts pretty well.
https://youtu.be/bsC8io4w1sY?feature=shared