I really dig it, very good, Erebos is perfect for this deck for sure.
I'd say Krovikan Vampire and Nearheath Stalker are your two weakest vampires -- I'd definitely replace one of them with Nirkana Revenant, and if you can find any other vampires the last would be a fine choice to replace.  For Morgue Burst, I'm sure there are better alternatives that can get creatures from your GY back into your hand (or into play, better yet), but I'm not sure which would be best exactly.  Death Pits of Rath would be great in conjunction with first strike, but I'm not sure you have enough things that give you first strike to make it worth it, since without first strike I think it does you more harm than good.  As for Homocidal Seclusion, I imagine you will generally have more than one creature in play at a time, but then you do have a lot of methods of sacrificing your creatures for benefits, so I could be mistaken.  Your lands look good, but I think you could find some cheap and better alternatives to Everglades.  Finally, I think Witch Hunt does you much more harm than good since you have a shitload of lifelink.


Other than those specific cards I think it looks perfect!