Here is my take.
One, I still don't like the idea of de powering the other Hulks, but that is just me.
Secondly, The writing and art of the series is top notch, so I cannot complain about that.
And, third, the reason why we haven't seen Hulk go all out is because he does NOT want to be HULK. He is going out of his way to not only act refined, but always wanting to prove himself to be something other than a brute. It like when you develop some sort of bad reputation early on in your youth, and then, years later, wanting to prove to those who know you really well that you can change and be a better person. I think 'Doc Green' is trying to do this. Unfortunately got him, due to the way he going about his business, 'Doc Green' will utterly fail in his endeavors. And when that happens, that is when we'll see the 'real' Hulk come to the fore.
IMO, of course...