The only justifiable concern about Adult Gohan is his machine gun legs. Everything else he has just makes him a good character.
Being able to do long block strings isn’t exclusive to Growhan, but he definitely can do probably the longest, safe, true blockstring in the game as long as he has meter and has you in the corner. The issue is, I believe, is that he builds this meter while doing the blockstring, certainly if he has assists able to cover his recovery on his regular machine gun kick on block. The only way out is guard cancel, but you have to have specific timing otherwise it will be stuffed. Not sure how they could change this, but wouldn’t be surprised if they did.
The other highlighted concern is the machine gun leg combo loops. I’m almost certain this wasn’t intended to be possible for Growhan. I think he should only be able to use regular machine gun legs once, but not sure how they could even nerf it in that manner. I guess a more practical nerf would be to add increased damage scaling after each machine gun legs, much like Supergirls float adds damage scaling each time it’s performed.
As an Adult Gohan main, I’m not like some people *cough* 16 mains *cough* that is in denial about how good the character is. I just hope his actual broken aspects are the things targeted, aka what I mentioned above.