Yeah that's what Im thinking now.
14, 13, 13, 12, 10, 8.
It makes it impossible for a Stat higher than 17 to start, places value on the Humans +1's to all by bumping 2 stats other than the main stat, and makes Half feats tempting for everyone (for Humans to push their main stat to 16, and for most Demihumans to push one of their 13's to a 14.
Demihumans can go 'all out' and push an Ability score to 17 at the start as well.
It only leaves Half-elves in the position of 'every class that cares about Charisma goes a Half-elf' (they get the 16 or 14 in Charisma, and also get to round out both Odd ability scores with the floating +1's.
That could be fixed by forcing Half elves to place one of the floating +1's into (say) Dexterity, and leaving the other one free.
Then you would see more Half elf Swashbucklers, Sorcerers, Warlocks and Dex based Paladins. With Strength/Con builds (Strength Paladins, Strength Warlocks) Human is the better choice (you dont get a wasted +1 in Dex, and start with a higher Strength and Con).