Its definatly interesting. I'm not sure you need 4 Macabre's maindeck...
I would definately try to work 4 Simians and possibly some ESGs into the deck (possibly in place of some

lands). Also you DEFINATLY need 1 maindeck Vexing Shusher. You should probably have 1 maindeck shop card as well. I prefer Viashino Heratic.
As to what to take out or move. You could probably move some number (if not all) the tarmogoyfs to the board. Cut back on REB and RnR effects in favor of a maindeck Shusher and Heratic along with 1-2 more of each in the board.