Despite the fact, that you could play more permanents then intendet, the ability to let permaments fly would be a strong power against certain false god/decks, that use heavy permanent control but little or none creature control... the real question is, would you be able to let pillars flying? I dont think this will work out, its way to complicated and it would either change a lot of the game or would be pretty much useless. either you are able to save all you permanents, which would be OP, or you cant risk to play them on the field.
but anyhow, why would you need more than the possible 13? permanent slots? if you have 6 SoGs, 2 boneyards, 2 different pillars and 3 Bonds out, and the opponent cant kill them, you are already owning the game. adding flying permanent cards would just kill your deck...