The best strategy for each fight this xpac has come down to using a DPS LB3.
I haven't seen a tank LB, much less a tank LB3, since doing final coil synced.
I only see healer LB3 doing more than offsetting an imminent wipe during normal midas or other very old content.

Will healer and tank LBs ever have priority over DPS LBs? Evidence in HW so far shows that no, they won't.

So why not have 3 different LB gauges, one for each role? Would there need to be tweaks? Maybe for healer LB3, but tank LBs are either very lackluster or super niche.