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.
That makes sense from a lower limit perspective, it was still interesting to see upper limits in place even though there are no negative modifiers.
We will see when we get the game if i can make my 17 dex, 16 con, and 15 char elven rogue, or if it will have to be 17 dex 15 con and 16 char.
If folks ask why odd numbers there will be interesting options with feats like actor and with a feat rich build like a rogue. Also why i hope i can roll the former more than the latter, durable isn't enticing enough vs actor.