This deck works well. It suffers from what all tribal decks suffer: it lives or dies by how many Zombies you have on the board. If I play Miasmic Mummy and discard a Gravecrawler, I lost nothing to that discard.
There wasn't much I could do against this Genesis Wave deck... it happens.
Here are a couple of wins. Here, I was able to land my Zombies at a good clip.
In this win I scored thanks to three Wayward Servants on the board.