Good point
I guess something that can be done and which I think was very rewarding and encouraged good team play, is weapon skill combs with different players. This used to happen in a sense back in ffxi. So for example a monk would use weapon skill X after which a dragoon would use weapon skill Y and a warrior would finish with weapon skill Z, all in quick succession resulting in a big coordinated combo attack move that may result in increased damage plus or minus some debuff. There would be many such combos between all classes. ( I think they used to be called skillchains, please correct me if I'm wrong, it's been a while)
This would encourage players to dps more actively in a coordinated manner with more insight into other classes.
As a reward to performing these skill chains( which woud happen frequently, for eg. 8+ times on a boss ) u get rewarded with maybe tp bonus or tp regen?, plus increase in ur limit break bar progress. I think this will allow more active tp management