If we up the ages then I'd probably rather have gone through Hinata's developmental changes already. What I mean is, no more Naruto panic attacks, her and Neji are fine, she's a seasoned Hyuga combatant, and she's still working towards earning the respect of her clan. 

Kakashi ...no real changes to him.

I'm fine with it, we just need to decide on the power scaling. Unless people 15-16 are this weak still.