Well, the devs tried to cram a smattering of mechanics and effects from both ink colors that dont really mesh well into a discernible and consistent plan
Pitiless Plunderer and Gemcutter Buccaneer walk the plank for being too focused on making Treasure work in a deck that really just wants to keep playing Pirates
Sliver Queen was the first five-color card, and it made it count
I had thought about flashing back the Cabal Therapy with Psychatog to grab the Hypnotic Specter I knew about from hand, but I also had a Pernicious Deed in hand and so had wanted to wipe out his board in one fell swoop
Still, a game like this does need to evolve with each new set in order to keep a recurring interest and look like a serious contender against the likes of MtG, Yu-Gi-Oh or even Pokmon
However, Cacophony Scamp can actually sacrifice itself for free when it deals combat damage to a player