I think, as far as races, they'll just say:
Optional Rule: Alternatives to Racial Ability Modifiers
Some races are famous for certain abilities, but not every member of each race has the same attributes. PCs are intended to represent exceptional characters in D&D. You may decide that your characters need not follow such limiting constraints or you may decide that fixed racial modifiers present negative stereotypes that should be avoided wherever possible. Instead of using the ability modifiers from a given race and subrace, you may eliminate racial ability modifiers entirely. In exchange, during character generation each player chooses one of the following options:
- Choose two attributes and increases each attribute by +2.
- Increase all six attributes by +1 each.
And while I don't think that's a complete fix for the problem and doesn't address all the balance issues, I think it's like a 85% fix for the issue. It's a
good enough fix to publish, especially as an optional rule. You might need to phrase it differently; I'm not a sensitivity expert. But it's pretty trivial to just
remove racial modifiers entirely and add in generic modifiers whole hog. It's not as elegant as other theoretical designs, but it's fast, easy, and
close enough. I don't think any of the races are remotely finely balanced enough that it's an issue. I'm fairly certain that Mearls or Crawford said that Darkvision carries no weight in terms of balance in 5e race design and is entirely a flavor choice, for example, and I think most players would strongly disagree with that position in terms of balance. However, if that's true then the race designs are more than fuzzy enough in terms of mechanical balance to not have to care about it. I don't believe there are any races whose primary draw is the large number of bonuses they get. Half-Elf maybe, but that's because Charisma is kind of a stupid good ability and the ability to choose two abilities to increase is pretty good.
The only thing that's missing is a fix to make Humans remain interesting and Variant Humans remain balanced, and I'm not convinced that it's really
that important. Maybe they could present a third option for Human for games that don't use feats, but I don't know how necessary that really is.