A feat chain where feat 2 builds logically from feat 1 sounds like a cool idea. For example, we already have Magic Initiate, which gives you two cantrips and a 1/day 1st level spell, all from the same class. I could see a feat that builds on that, perhaps "Magic Adept", which would give you another 1st level spell and a 2nd level spell, also 1/day. A level 1 + level 2 spell feat is objectively more powerful than a 2 cantrips + level 1 spell feat, but it's a fair expansion.