Since Larian are extensively house ruling, I would like to try playing with extra feat picks.

I think coupling feats with ability score increases was a big mistake 5e did. That is not a fun decision. ASI's and feats are different aspects of character development and players shouldn't have to choose between them. 3e felt a lot better in this regard.

While I wait for 5.5e to fix this, I would settle for an extra feat at level 1 in BG3. Or a feat every 3 levels that would be separated from ASI's