Aside from the quick burst damage of the initial backstab, they have really no way to defend themselves. As mentioned in previous posts, if they are not needed for any traps, why bother taking them along for a quest when they are so high upkeep?
Rogues are wonderful creatures (at least the Halflings are, all the other ones can rot
That being said: I believe there are a couple things, aside from dual-backstab, that could really give rogues more utility in battle. How about feint feat? It could do a check for your backstab versus their dodge (due to game mechanics - normally, for those who don't know, it is "bluff" versus "spot" [Yes, this would cripple rogues slightly in comparison to real D&D, but it is better than nothing, no?]). With normal feint, it could take 1 round. Later, perhaps, one could learn 'improved feint' where the check and damage are done within the same round.
Now, while they still cannot take a hit due to their physical limitations, they will be a nice, steady substitute for a mage damage-wise with much less utility.






