I honestly like the overall concept of a LB and I especially like it the most in the new Pvp mode.

I feel Square should rework the whole LB system and make it so everyone has their own individual LB gauge and every class has its own individual LB in PVE.
Also don't make PVE fights require LB3 anymore and make every class have their individual LB similar to Pvp. Also make it charge faster.

As a tank I almost never use my LB in PVE except for some fights where it is required. But in Pvp I use my LB all the time.