No one an replace Cokeboy as a promoter + main booker. The insane levels of work (and coke) needed to pull that kind of thing can't be given to just 1 person.
I think at this stage HHH can be a good promoter. He's done a nice work with NXT, seems to know the kind of audience his show is aimed for and has had more than a decade of Vince teaching him how to promote. I also like how he's gave talented people important positions in Regal and Ryan Ward.