When I read Loamhedge, almost at the end, there was this Wearet (Kharanjul I think), that was just so creepy. If there were a whole army of them, I think that would be a decent book. Because they just look so evil. ~shivers~
Wearets are supposed to be rare, highly dangerous enemies-- having a whole army of them would make them too numerous and common. That being said, I certainly think they'd be good secondary enemies or even main villains for fanfictions.
They're hardly the most popular of enemies, seeing as they're both strange crossbreeds and grotesquely figured. In addition to that, one may as well get another possibly more vicious and strong enemy, a wolverine, to take a wearet's place.
Interesting thing about wearets: they are the only made up creatures in the stories, marking a bit more of the fantasy side of the stories, as well as them being original to only Mr. Jacques. I don't believe there has ever been a crossbreed between weasels and ferrets, or whatever they were supposed to be.
Fun Fact: I'm a Wearet enthusiast! I love them! They are so cool!