I would:
Drop
Beast WhispererDrop
Carrion FeederDrop Nethroi (you want things back to hand not enter the battlefield. Too many 0/0's)
Swap
Reclamation Sage with
Tend the Pests, you get another sac outlet that gains you tokens which gains you life.
Swap Yawgmoth with
Plaguemaw Beast, fits with sacrifice in order to proliferate versus someone that will force you to lose card advantage to proliferate.
Swap
Anguished Unmaking for
Utter End. One mana more and no life loss.
Swap
Springbloom Druid for Fiend Artisian, he's a tutor that buffs himself and you can sac tokens to versus a card that isn't reanimateable since you have to sac lands to ramp. Or get better ramp.
These are all the suggestions I could come up with, hope it helps and good luck! You helped me edit my own Abzan deck with this lol.