I could go for a compromise - cheaper, less-powerful skills have a shorter recovery time while flashier, high-powered attacks might lock you into place for a third to a half a second longer.

Regardless, only concern regarding this topic is the sliding. If SE could somehow creatively incorporate sliding/gliding as an intended aesthetic, I wouldn't mind it so much, but I don't think the fanbase is going to be happy with Advent Children/Dissidia air-dashes or DBZ-style levitation. Jehuty-skating, maybe?