Li Shenron
Legend
I'd like to see some small feat chains.
Obviously we can't have chains on the same scale as 3.X because you can't get nearly as many feats, BUT, I'd like to have options where a character dedicated to a build can advance via taking feats in place of stat-boosts.
Like, take Magic Initiate. Grants 2 cantrips, and 1 1st level spell usable once per long rest.
Add two more feats into a chain
Magic Novice - Prereq: Magic Initiate. You now have two level 1 spell slots and a level 2 spell slot, and know one level 2 spell from the same class you have Magic Initiate for. Your 1st level spell is know a spell known and castable using your slots instead of 1/long rest.
Magic Adept - Prereq: Magic Novice. You now have 3 1st level slots, 2 2nd level slots, and 1 3rd level slot. You gain 1 1st level spell known and 1 3rd level spell known.
These are completely off the top of my head ideas mind you, they need testing and balancing to see if they're worth it, but that's beside the point.
Any way, the most important thing IMO is keeping feats in the power realm of "Worth sacrificing the Stat boost, but not so powerful that they are necessary".
Didn't we actually have that specific feat chain during the playtest? I think I remember being surprised it was dropped.