Perhaps it is used a lot at endgame, but I've only seen BR used in parties I've been in purely for fun. And that just goes to show how unintuitive it is. With the skillchain, it had use at any level, and could even be done through a pure lucky fluke. With how BR functions now, and with how easy mobs are to deal with, it's simply more trouble than it is worth to coordinate everything.

The "fix" could be something as simple as when someone TPs, there is a Battle Regiment buffer period to follow up with another WS. The main problem, as with pretty much every glaring issue in this game, is the developers apparently loathe the idea of taking the good ideas implemented in FFXI, and incorporating them into their new MMO.