These are a great idea- I love how you have incorporated the traditional vampire weaknesses in these rules!
As it happens, I myself have just sent a set of 'Vampiric Gifts' Skills over to the good folks at Osprey- this is going to be part of some ongoing, downloadable support for
Dracula's America that- all being well- will be steadily trickling out over the coming months. I couldn't speak as to the exact time-frame as that is up to Osprey, of course!
The upcoming Vampiric Gifts are not quite as in-depth as your own ideas, but do include the ability to summon distracting swarms of vermin, compel a Transfixed victim, assume an ethereal/mist form, make flying leaps into combat (I like to think of the model turning into a cloud of bats!), and tap into their bloodlust to become deadlier in a Fight...
I thought about giving vamps shape-shifting in the early days, but in the end I decided to keep that as the preserve of the Skinwalkers and Forsaken lycanthropes!