If attacking isn't an option as a win condition because of some reason or another, there's a backup win condition in group slug cards like Impact TremorsImpact Tremors and Warleader's CallWarleader's Call
Even if you dont plan to make use of your exalted triggers, a steady supply of 0/3s will help slow down aggressive opponents and draw you even more cards if youre playing creatures like the aforementioned Welcoming Vampire, Mentor of the Meek, or Bennie Bracks, Zoologist
Clever MTG players actually use Gravecrawler as repeatable sacrifice fodder, allowing them to get enormous value from other cards without having to wipe out their entire board with multiple sacrifices
Why this in the Sorin Vampire deck
If you play this with Explosive Singularity on top of your library, and manage to sacrifice your Hidetsugu and Kairi, you may get an easy lethal combo the same turn