Vampires should be able to eat cubes of flesh and offals.

I can understand vampires not eating food, but I notice these items are literally blood and guts that can be eaten by non-vampire characters but not vampire characters themselves that are supposed to favor blood. This is more of a thematic suggestion than a balance one.

 

I was thinking the same thing with the flesh stuff.

 

That's a neat little idea. It is technically, "The flesh of mortals."