He needs the Int to disarm traps more successfully, no? And he needs Wis to Spot things ahead of time.
Since meaningful AC is impossible to acheive and rogues have high relfex saves to begin with, all the Dex does is Open Lock and Hide/Move Silently, which don't need to be maxed.
So any points for Str or Con would have to come from Dex... how messed up is that? In DDO, Dex is a dump stat for Rogues?