I feel in a way Mob didnt really know the guys full power so when he went 100% rage he did hold back his full power.
Now that he knew the guys max he just went above it and just kicked his ass.
Mob really doesnt fight people so maybe his powers are just building up faster now that he fought someone who pretty much knocked him out.
We really cant say how strong he is. I could see how he would be a disadvantage when he goes crazy because he isnt thinking at all of his actions.
I am really enjoying the show. I hope it has more than 12 epsiodes