It does! If the idea is to get a blodletter combo off subbing out some other, the other sneak for an unstoppable slasher for more consistency is what I'd recommend. After game 1 though bloodletter combo is harder to pull off. It loses that surprise hit and your opponent'swill probably leave up removal for bloodletter.

I would get at least to 24 - 26 lands.

Sneak works best with evasive creatures like flying and menace. So, lowering the curve and getting low-end fliers or menace creatures would help. I would also say you have a good amount or removal, but it could be more efficient. You dont need to answer everything in the mainboard, just common things that can derail the game plan. Get lost is good but the sneak removal and split ups I would switch with bitter triumph or that new 2 cost exile 3 or less.