Maxperson
Morkus from Orkus
It's +1s to stats that are incredibly overvalued. +1 more to hit is literally going to be 1 more hit every 20 attacks, which even for a PC with extra attack is going to on average be 1 time every 3-4 fights, assuming fights average 3 rounds. +1 more to AC is going to matter a bit more, depending on how many attacks, but the vast majority of the time it's just not going to matter at all. Nobody is going to notice the extra hits or misses. Or extra successful saves(which are even less frequent than the extra hit every 3-4 fights).I don't put any stock in that sort of list or analysis, frankly. Overvaluing variant Human is one of the big reasons why.
And that's if you're lucky enough turn an odd stat into an even one. A lot of the time you're just turning a 12 into a 13 or something.
On the other hand, feats will be used a whole lot more, having a large impact on the game, and actually be seen to be working.