Liliana's Mastery: a little too heavy
While sorting wasn't an issue there the effective existence of extra colours (10 rather than 5) was
Its hard looking at a card like Chulane and finding faults, but if you needed to nit-pick, you could criticise the mana cost for requiring three different colours, or the fact that it doesnt come with any ways to reduce mana costs for creatures you play
The biggest aha moment was when Gerry Thompson pointed out that it could play lands
5 mana is perfectly accessible for a casting cost, and with a way to move your permanents out of harms way or cast them from suspend or the graveyard, it has almost no equal when it comes to facilitating the end of the game
Strangely enough, the people who benefit from this new change of tactics the most arent Commander players, but those who are sick of seeing Commander cards everywhere