I'd rather everyone have their own lb as well. Given that they seem to be reluctant to change the lb system, maybe that could stay as it is, and they instead add something similar, maybe call it Trance or something (from FFIX).

Tanks trance meter could build from the amount of damage they personally mitigate while in tank stance (to promote CD usage), or dps when out of tank stance.
Heals could build on healing done (obv lol) but not overheal, and dps while in cleric
Dps obv could build on damage done. Not an arbitrary number, but based on class. Certain tweaks could be made to each class, to take into account things like BRDs singing etc

could be used to encourage people to play their classes well

SMN trance move could be that new akh morn nidhogg uses, love that animation lol