UngeheuerLich said:No, system mastery actually breaks 3.5... and thats just wrong.
I tried playing 3.5 two weeks ago, and i was disgusted...
I will not stay with 3.5. Play experience with system masters who use their mastery is pretty bad. Not beeing able to make use of your mastery is also bad.
Actually, that does a good job of illustrating the large variance in power dependent on how you build your character.
I don't use system mastery to break the game, but rather to build the character concept I want - and I'm never dead weight. My golden rule of DMing was "Don't be a douche, which means don't try to break the game." As such, I do the same thing when I'm a player, otherwise that would make me a hypocrite.
A character design concept of 4e is that battle powers are a separate resource than other resources (utility and rituals are different than attack powers) means that system mastery isn't needed, but the options are still there.