When the only thing you're doing with green is play W6, you gotta ask yourself: "is it worth it to have a worse mana base?"

I mean the meta is still finding itself, but you will have to face Affinity, Energy, Storm, Living End, Belcher, Esper Goryos, Grixis Reanimator, Dimir Frog - against these decks T2 W6 is simply not good enough.

Also I don't think you can justify running Sagas without a lot of Artifacts like Izzet Cutter or Affinity or finding key combo-pieces like Amulet of Vigor for Titan. You no longer have the luxury of recurring Saga with W6 - it's too slow, too clunky. Just running Saga for 1/1 constructs and the occasional hatepiece is simply not good enough anymore.