Well, IMO the Dragonmaw can be pretty useful.

When you want to persuade someone, you call in a diplomat. Someone who speaks in complete sentences, uses long words, brushes their teeth and has an impressive crease in their trousers.

When you want to fight a battle with someone, you call in a warrior. Someone who trains and practices warfare; who walks tall, acts tough, and lives for honor and/or glory.

When you want to make someone hurt, or when you want to do something crazy, you can't call in one of your own people. You need some crew of crazy hard-fisted pipe-swinging gangsters who don't really have anything to lose and don't care about love, money, honor, peace or war - but just want to lay down pain and rule over something. Some batshiat-crazy nutcases that, when seeing a new type of scorpion, would first sting themselves with it to see just how much it hurt and how dangerous its poison was. To me, that's the Dragonmaw. They've been in so much insane stuff and have been mercenaries for so long I'm not sure they remember which way is up anymore. Even if Garrosh didn't have something he wanted them to do, it's a good idea to keep at least one eye on people like that. They might decide to blow up half the planet because it sounds like something fun to do after teatime.