Vampire Overhaul (ver. 2, OP updated!)

[locusts]

It's a tricky needle to thread. My initial reaction was that you could simply make Holy Water harder to acquire, for instance by making it so that only the Chaplain could produce it, and even then only in limited quantities, but knowing the playerbase I wouldn't be surpised if that was instantly worked around.

Regardless, some of the ideas produced in this thread as well as recent changes to the game make me think a revised version of the OP is in order, so I'll keep reading what people post and update it in the near future.