I don't really find the new BLM substantially more mobile than the old, because it has the same incentive to save all its movement tools for a damage gain at the end of its astral cycle (specifically, transpose + instant casting Blizzard 3). You're still choosing between damage and mobility and if you're too greedy you lose both.

I don't think I would've had trouble doing any of the new fights on 7.1 BLM, and don't really see that 7.2 BLM will let me do something requiring constant movement any better because the total count of instant GCDs available to me hasn't changed.