Making the Tank able to kick people from party without any worry of punishment, will be a great addon. DPS can be replaced fast. And being free of kicking bitching dps have to me more value than 50,000 tomestones.
So, if you're a bad/troll tank and DPS are bitching about it, lets kick them?
IMO, new tank-only mounts are enough reason to participate in low roulette as a tank (on top of instant queue and other things). For me, at least ^_^