TiwazTyrsfist
Adventurer
This, BTW, is why I HATED the Unearthed Arcana for Eberron races they put out at 5e launch, because the races end up being MASSIVELY under-powered compared to core races.
I'd just like to say, in your analysis, I'd personally Upgrade the High Elf Cantrip from "Proficiency" to "Trait", on the basis that, while the other cantrips races get are fairly minor, things that do a utility function, that sort of thing, a High Elf can select ANY wizard cantrip, and therefore select something combat useful. Especially since a combat cantrip would scale with the HElfs character level.
Also, I think you're under valuing the Feat in the Human Variant. You trade away 4 +1's to Atts for One Feat and One Skill Proficiency.
And yet, EVERY human character I have encountered in AdvLeag is Human Variant, and they are one of the most commonly played races.
This tells me the ROI for a Feat is BETTER than +1 to your 4 other attributes.
It seems like feats should be equal to +2 to Atts, since you give up your att advancement to buy them at later levels, but largely it doesn't work out that way.