Like the bloodless thing on undead, in my experience Drac and sanguine were jarringly good, and my Drac worshipers were not really taking either the prep or undead killing penalties seriously.
The problem I have with that is that undead presence varies dramatically by dungeon, so it's a poor factor by which to balance Dracul. I feel that being able to work around undead killing is in line with what happened to all the deities in the beta - you generally can get them angry so long as you counter-balance it with what makes them happy.
Well, true... Idk, the undead trait didn't mean much in general - it was important poison proofing for various places, gave the priest a class feature and drac a symbolic penalty. What it does now in case of all the bloodless ones is more interesting. It's not just drac it's affecting.
It's a big nerf to the vampire for one thing, which is fine by me since he was strong enough to beat VGT. It's a nerf to bloodsteal in genral, which again is fine by me because it's not a huge deal I think. It's a nerf to the bloodmage, but if it results in something being done about his burning stacking disadvantages, it'll probably be fine (and wraiths were huge ding fodder for him anyway). It's a nerf to sanguine, but I guess we all know how good that is.
But the most interesting thing about it is that it's a factual nerf to EM (which is good in my book), but such a nerf that it highlights something as a viable option. You can now choose to IMAWAL Undead without concerns about plantation bloodpools fodder. You don't get any anyway, so why not use undead for IMAWAL, and kick the other guys backsides?
I'd say it's interesting more than serious, and the things it hits are rather strong and probably won't be too hurt by it.