White eyes being transformed isn't your biggest problem. Aggro shaman is the most popular shaman build, mages are very rare and rarely have poly, and priests have 1 or no entombs from my experience.
The biggest issue is having the correct answers to your opponents' plays, turns 1 through 4, even5. If you don't draw that hex, etc. You can get run over quickly. This includes jade druid, because if you don't have a lead on board, it's close to an auto loss. In other words, it's more of a consistency issue than anything else.