OP, this is a good homebrew rule to talk to your DM and fellow players about. Some tables prefer to keep it as-is, citing that it picking between the two makes for a meaningful choice. Others, me included, prefer to have their cake and eat it too. It’ll make your campaign feel a little bit more high fantasy, with a party of adventurers that all have 20 in their main stats. For many, that’s a positive.

If your DM is comfortable adjusting encounters for a party with maxed stats and a couple extra feats, it’s (imo) a great rule to run with.