It's a mechanism that makes use of TP when not in battle, or on a battle class. It can be used as a short burst of speed with the cost of not having TP for a while, so not something one can abuse when among mobs. It's beyond the simple mechanic of whether you're engaged or not.

That all being said, the duration-to-TP cost balance may be tweaked for beta/release perhaps to make it less spammy, but for the most part it's something to use in towns to move short distances quickly so it seems fine. There's Aethernet for longer runs within town, and chocobo/mount outside town.

Ultimately, non-issue. It's ONLY a plus compared to before. Your thread gives the impression of a 3 year-old being handed delicious chocolate ice-cream, and then instead of being happy about it complaining that it's not chocolate chip. Sure, you're not complaining explicitly, but still forming a cynical perspective on a feature that has no down side whatsoever.