Originally Posted by
Mr. Safety
Free 2/1's, sometimes with haste, has a tendency to make the deck pretty explosive. If there was a better creature I'd definitely play it. I am playing Stinkweed Imp as well, so I get free Bloodghasts pretty often. It rewards mid-late game lands that would otherwise be dead. I can understand using Gravecrawler instead because you aren't using Stinkweeds. However, I really think you need more zombies to make Gravecrawler work, probably at a minimum a set of Trolls and 1-2 Mutavaults. As was mentioned earlier in the thread, Carrion Feeder can be pretty good with Gravecrawler, too.
Last thought: I'm fairly certain that Stinkweed Imp will be a necessary evil, if only to shore up the Dark Depths matchups.