Not gonna lie, i skimmed though this. Your idea's are great but i do not want vampire's to be forced into the whole hp as a new resource thing.
The skill line need's help yes but it's just not are time yet. Wrobel has already stated that in the dark brotherhood dlc vampire's and werewolf's will get some polish.
I have plenty of thread's myself to change/tweak/fix/etc to vampire's and not one has gotten any attention from the dev's. It's a shame but they have a lot of work on their hand's.