Sashi said:So you feel straightjacketed by a system that lets you do by default something that required a prestige class to accomplish? Not to sound offensive, but you've drunk the 3E Kool-Aid. If you reduce the options and normalize their power levels, it's much easier to mix them however you want, instead of requiring 3 Rogue/3 Wizard then having a PrC that advances Sneak Attack and Casting (if you want that in 4E you can multiclass rogue/wizard and train some skills up)
I think the system mastering of multiclassing and PrC usage is something the OP really enjoys.
From what he has written, a part of the game that he enjoys he will no longer be able to do. He seems to really liked the options and the sometimes rather extreme differences in the options that he could play with, it was a feature to him and not a bug.