Noah has been making The Mimeoplasm work for him during 2015. It's a strong deck and I'm pleased to say that I did well against it! The biggest key: Sosuke's Summons. That card is just outstanding here and without it I don't know that this deck could perform as well.
I'm not the only one who's been tinkering with Kaseto; Jason Alt at Gathering Magic made a deck with more of a "I get benefits when my creatures are unblocked" theme. I don't really see anything too revelatory there: the goal is to generate a ton of mana for cards like...sigh...Orochi Hatchery. The use of Nature's Will is a good one but isn't exactly what I'm looking for-and I didn't see Bear Umbra, which would help the theme and help preserve the creatures.
Similarly, I don't see that use in Doctor MTG's take on the deck, although he clearly is going for an infinite mana combo in order to break cards like Hatchery or Snake Basket. In addition, I should seriously consider cards like Blight Mamba (which can kill in one swipe), Wasteland Viper and Mold Adder. I'm not so high on Snake Pit because if my opponent isn't running blue or black, the card is dead. Mold Adder still provides me with a snake to trigger Door of Destinies or Sosuke's Summons and if there are black or blue spells being cast by opponents: bonus!
What I do like in Doctor MTG's take is some of the blue additions, especially Leyline of Anticipation and Kruphix, God of Horizons. I don't know if there's room in the deck for them but I'm keeping those ideas on my radar for sure.
One suggestion I'm very excited about is Cryptic Gateway. This is Matt's idea and I am amazed I'd overlooked this card for so long. The combination, especially with Sosuke's Summons, is so good! 3 mana for 3 creatures and the ability to recast Sosuke's Summons? Oh yes.