Would you nerf Ivan Ooze,
@Thundergodd ? He was arguably the single most broken character to ever exist, and had literally no reason to lose against any character in his game.
I'd like to address your philosophy of never nerfing, and why it simply isn't feasible in a game like this. You keep bringing up the idea that every other character should recieve significant buffs to the level of the rest of the top tiers. Now, I'm of the opinion that some buffs and nerfs need to happen, but every single change that is made can and often does carry with it unintended consequences that in turn require more rebalancing to address.
Therefore, it is wisest to make as few changes as possible. Nerfing 3-5 problem characters slightly is going to make much fewer waves than significantly buffing ~25.
While true balance is unattainable, it does not devalue the effort or the fruits of striving towards it. Perfection is impossible, but we can go from good enough to actually well balanced overall. Also, the balance we have at this time will only get worse. People once thought vanilla Mk X was pretty balanced, myself included. Hindsight makes that an utterly laughable statement. It certainly can get better.
Also, if you're worried specifically about Black Adam, don't be. They've got some experience nerfing him this time. He ended up a decent mid tier, and I expect the same or less of a fall.
I would definitely gut Aquaman if I had the choice though. The game as a whole would widely benefit. He's far too polarizing. All it would really take is making him punishable on mb trident rush. I say this as a Venomous main in MK X, this chip is cancer. There's utterly no risk, and the slight negative frames, combined with the pushback and his normals often mean it's still his turn.
There's crying for nerfs as you put it, and there's a measured response to what has been proven with evidence to be a negative factor on the game as a whole. The two can actually coincide, but many of the people in this thread fall more into the latter category.