The thing is, you will always be squishier then a warrior. i have a brewmaster 499–502 ilvl, very good gear, really and i have an alt prot warrior ilvl 476.
all my healers are happier with the warrior. princess add phase is a piece of cake compared to the brewmaster. but for me, brewmaster is more fun. you do very much dps, have a high aggro, self heal and the raid heal is good. so now i'm stuck between those two classes.
it's really hard to make a decision.
to add something about brewmasters and "skill" there is nothing to it. people making it up because GC said so. there is no "more or less" skill dependence with that class. you have 3 skills to look after. all the other stuff is situational. look at the energy bar, look at your chi, gaining chi with jab and keg, spend you chi for Blackout Kick, have your 30 sec. tiger buff up and use elusive brew when you need it. thats all. i think, with all that CD stuff a prot warrior does have there is more stuff to look at.