Personally, my concern wouldn't be about some theoretical force user and non-force guy with thousands of XP each competing in their niches. OTOH, what about what happens if say the Force Using Sage and say the non-force Charmer are both sick of failing Athletics checks involved in their space adventures with their 1 Brawn races. It's Star Wars, it seems like everyone ends up running around, climbing on stuff, jumping from vehicles, etc right? It seems like even at FR 2 or 3, a few Force Dice being added to physical checks from Enhance are going to be more effective at keeping the character from sucking at basic 'space hero' type stuff than adding a few skill ranks to a 1 stat.
For example, 15 XP buys Enhance and lets it work on Athletics and Resilience, so our Brawn 1 character who is partially through Sage has a G and 2FD to jump and not get poisoned. OTOH, 15 XP buys 2 ranks in class skills, or one and a half ranks in non career skills. Going from a G to Y against 2 difficulty is not exactly the biggest improvement, and putting 2 ranks into Athletics leaves our Twilek with like a 50% chance to succeed. Versus the Force user who has a 23% chance before Enhance, can always get at least 2 successes with strain and a flip (and has more than a 50/50 of getting +2 without needing to flip). That seems strictly in the Force User's favor, and they covered Resilience too, and this required that the other guy had Athletics as a class skill to boot.
Keep in mind: in order to use those dice on the test in the first place, the Sage has to not have them committed. No Sense upgrade, Battle Meditation maintenance, or various other uses of the Force. There's more at work than that 15xp here, because having those Force die available to use means sacrificing their use somewhere else.
Also, the Charmer has it easy in this scenario: Works Like a Charm lets them sub in their Presence for their Brawn, and will now be rolling multiple green die with almost certainly better odds of success.
Force Users and non-Force Users in this system are supremely balanced. I'm normally very open to house rules myself (everyone has their own preferences), but this is one area where I really question the need for them.