Tovec
Explorer
Trying to balance Monks with other martial classes is going all Mary Sue on them?
As [MENTION=86468]Transbot9[/MENTION] said, they're not regular martial classes. So, in that respect, yes.
It is like trying to match up a rogue, scout (3.5), ninja or similiar with fighters. Yes they're not going to be as good at HIT ENEMY WITH STICK but they do their own thing and do it reasonably well.
Going back to the idea (I hope it was this thread) of which role the monk fits into? Monks would likely replace rogues, though when going for sheer damage output not as well. They aren't a fighter class, they aren't magic users they are people who excel at getting in, killing something and getting out. Or they're good at staying at or near the front lines, living through everything and helping the party fighter do some more damage or lock down enemies. They are most like rogues in the fact they are mage-banes, they aren't meant to go toe to toe with meat sacks. Many can be built in different varieties but that isn't their primary goal.