In thinking back, an Ability Upgrade in this system is very much akin to a 1d6 boost to your d20 roll. If I were to play Saga Edition again, I might make Force points a zero-sum party resource that kept their mechanical benefits but also gave the PCs some choices as to how to influence the story.
If I were to play Saga Edition
I don't really relish the idea of 2- to 3-hour prep times before a game session.