It IS in the way, I don't want a cluttered interface, particularly as a healer.
So, I'm not happy with the clutter it adds to the interface, some people don't mind, well just let people chose if they want this or not ? :-)

TP bar is far less critical than MP bar, knowing your heals are OOM is much more important than knowing you can ease a DPS job, compensating for his lack of judgement, or excessive consumption of AOE ^^

Although, yes, it is useful, and it allows smart use of TP regen skills, but some people play roles who don't really bother since they can't do anything: SMN, BLM, SCH, WHM, DRG, MNK, which is half of the classes already. Tank classes don't really care either, although knowing the MT is out of TP can be useful for the OT, even if you can just communicate to tell that....

If you do implement an option, please make a text command to enable / disable so we could just use macro to switch job/outfit + enable / disable the option at the same time :-)

That said, would it also be possible to disable completely MP / TP bars when not in a fight ? We don't need them at all out of battle and it takes space for nothing in this situation. I want to be able to see the scenery while still being able to know who is in my team. But if I'm not fighting, I don't really need to know if they are running, or that they are full MP. Can't bars show up only when in instances (raids, dungeons, trials, ...) ?