One thing i havent seen anything on is if the natural racial limits and upper bounds are still in play. What i mean by that is for example high elves cannot go lower than 9 int or higher than 15 con.
Because the limits are driven by the racial ability bonuses (eg the base lower limit for INT with point buy is 8, so for a high-elf with +1 INT the lower limit is 9), I don't see why things like that would apply when the ability scores are moveable to other attributes. Rather, if I changed my high elf to have +1 to STR and +2 for CHA for any reason, I'd expect their minimum STR to be 9 and CHA to be 10 on point buy. That's speculation of course, but reflects my (admittedly novice) understanding of how ability bonuses in D&D work more generally.
