Change for the sake of change, which 4th edition is all about, is never any good. The 3.5e and d20 rules, as they are, work. 4e is just a money grab and nothing more. Wait 2 years and we will have 4.5e and 2 to 3 years after that we will have 5e. If they were actually improving the game, which they are not by every piece of released information I have read so far, that would be different.