I always thought it would be a more fun and co-operative system if every job got a personal LB and by using them in a specific order you could create a specific aftermath effect. Similar to systems like ffxi’s skillchains, 1.0’s battle regimen, or single player games like ff tactics combo system or ff12’s mist system.

For example every player could get a single LB bar that lets them use a job specific attack that’s just a powerful attack in its own right (not as powerful as a current LB but still worth using). Every person that uses one adds an aftermath stack and changes their LB button to “trigger aftermath”.

Aftermaths would basically be the current LBs and the more aftermath stacks you build the more powerful the resulting effect.