Rescue is a very useful ability. It can save you from one wave pulling tanks, from casting raise or using gcd to heal someone eating a mechanic, and it provides you with the opportunity to kill anyone you don't like in certain boss fights. Don't piss off healers. I will check if I can leap back to the middle of the arena with Sage after rescuing someone out of the arena. Rescue's cd should be decreased.

I doubt that Scholar's movement can do all of that. Maybe it will be good for multiple waves pulls if they remove gates, the bonus movement speed will allow the tank to outrun the mobs and avoid taking unnecessary damage.