Xeviat
Dungeon Mistress, she/her
I think I'd just change the +1 ability of the feat to +2, which would thematically group feats into which ability score/s they're tied to.So if I am following you correctly, at 4th level your options would be:
Pick a feat. It is a half-feat so includes a static ASI +1 (some might be dynamic depending on the feat).
Apply a dynamic (i.e. floating) ASI +1.
If you apply the dynamic ASI +1 to match the half-feat ASI +1, you will effectively still have the ASI +2, but the benefits of the half-feat to go with them.
Right?
I like +2s far more than +1s since a +2 always provides a benefit. Taking a +1 on top of an even score feels so blah.