I think you'll see a lot less variation in race/class match-ups. Because you can't "make up" stats later, you will need to maximize them from the get-go. Have the stats to playa strength-based frontliner? Mountain dwarf with +2 Str and Con will be very attractive while this half-elf concept you want to try with +1 to two stats and +2 to charisma likely wont cut it.
Also some classes are more reliant on secondary stats, I think MAD classes will be less effective.
There's diminishing return for feats. Think like this, for your second feat choice you can never get anything as good as your first choice, because you already have it. After a couple there's less synergy in a 4th or a 5th as well. Will that encourage characters who can get synergies from lots of feats, like the sentinal, polearm master, great weapon master with heavy armor mastery, vs the monk with mobility and three things that don't feed together?