So is Mighty Leap just strictly better than Super Jump? Its numbers are identical but you get Takeoff as well. With Mystic Flight there's at least the drawback of not working with Afterburner. On the other hand, Takeoff seems kind of useless, being an attack power that requires your endurance-guzzling travel power to be active. Given the long recharge I guess the idea is that you open with it and then toggle Mighty Leap off, but that seems kind of clumsy.
I'd expected that Mighty Leap would be less powerful but lower-endurance than Super Jump.