Odd Shaman was the first deck I tried out after Witchwood was released, and while having the option to always generate the totem you want was very nice, the deck lacked a good wincon outside the usual "flood the board, pray the opponent can't clear, and bloodlust."
I've tired variants with a focus on Totems, Elementals, and one with both. Overall, trading the options to include Even Cost cards for Totemic Slam, is not worth it in most cases. The deck's power level rises in Wild, but then it has to face other Wild decks such as Jade Druid and Big Priest which will almost always bet Odd Shaman.
tl;dr - I've built it, and it was a fun deck, but not too competitive at the moment.