First off, I think they should either stick with the true power levels or just make everyone closely even. For example, even after 4 transformations freiza's powerlevel was only around 1 million? Then he went muscular (sp?) and was around 3 million? SSJ3 Goku would be way too strong, so its a maybe, but an un-even balance.
As for SSJ4, I dont mind them but its not akira's work so I dont care as much. They should limit transformations to SSJ2 I think but still, Krillin isnt too important and he's too weak by this time.
What they should do in my opinion is have transformations for different characters like: Give Freiza 5 tranformations (I know its 4 but in the fourth one he has that muscular stage), have someone like Goku have 3 (or 2 so he can only go SSJ2), have Cell go perfect, Gohan go SSJ2, Picollo is fine where he is, buu should also have his kid buu stage and stop there, anything else is way too powerful, and for trunks, they should include his USSJ stage.