This isn't needed.

After you start getting over level 50 exp gains start to slow down some. Also if obtaining a new skill out of the blue really freaks you out then just ignore it until you finish what you're currently and then analyze it. Alternatively look ahead if you can see skills before obtaining them.

As mentioned prior the game will sync you down on it's own(or force you to in the case of fates). I hate to burst your bubble but this idea is wasted dev time since there's barely any justification for such an endeavor. With how the dev team likes to overexaggerate even basic functions and programming something like this would be nigh impossible for them to do anyway.