Creating a deep pool of colorless-ish cards that reward a number of different strategies (remember, not all decks can support running four copies Professor's Research, so they rely on completely different engines!) could solve some color-innate problems and put all the decks on an equal field
With Spirit Reaper and other cards came even more ways to control your opponents hand and field, only making the birds power all that much harder to match
Whenever Raphael attacks, until end of turn, you may play a card exiled with Raphael
Koraidon ex (125/198) roars with Fighting might$40+ for #252/198
I was hoping for a flatter card pocket
Mystic Forge and things like Helm of Awakening already give you access to almost infinite storm count and card draw, which paired with your commander gives you some faster and additional card draw