The only one I've seen a real shortage of is the staff. Then again, I didn't search very hard. I've seen a decent number of both weak and strong ones, but I came across few enough mid range ones while I once considered it for a warrior's second spec, that I decided against it.

However, there are definitely enough flails and whips, even if there's not as many easy to find examples of other things. The huge number of swords doesn't mean there aren't enough choices on other weapons, it just means they aren't as easy to find.