LOL great ideas! (FYI already done in our house-rules.

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Seriously though, this is why our table:
- bumped proficiency to +8 max
- changed expertise to +2, +3 at level 7, and +4 at level 14 (we are probably going to go back to just granting advantage though)made the odd's the bumps for + modifiers (9-12 is +0, 13-14 is +1, 15-16 is +2, 17-18 is +3, 19 - 20 is +4; then it reverts to normal)
- removed racial ASIs
- cap scores at 18 max. if a the main race (not subrace) normally has +2 ASI, their cap is 20.
This way proficiency counts for more (which we want) than ability scores. The normal max is still +11 (+8 and +3) with cap 18's, so just as RAW. Expertise gets a little nerfed (max +15 normally instead of +17), but it hasn't hurt it at all.