this mod would be more interesting if it was less polarized/better balanced. It isn't difficult to create ridiculous abilities and creatures with raws then shoehorn them into the game.. the mods that become mainstream are the ones that add opponents that are interesting to fight WITHOUT overthrowing the existing balance. As is, once the player gets hold of most the abilities on offer here the game becomes silly. If you were to release an alternative, more moderate version of this (less nightcreature spam in worldgen, night creatures that are resistant to non-silver weapons rather than immune, vampires etc that are dangerous with being ridiculous) then maybe you would receive more interest.
Fair enough criticism, though I would like to point out that I did spend a large amount of time balancing this mod, and it is balanced, though perhaps not in the way you expected. Lesser and master vampires are not intended to be enemies that one fights alone. With 3 people, you can usually win against a lesser vampire, assuming you have decent skills. With 8 to ten, you have a chance against a master. Werebeasts can be weak to all 4 human weapons-grade materials, depending on their type. Also, acquiring all powers, or even most of them, is impossible. You can have one curse, and in the next version, one secret (though currently you can get them all). The actual chances of you becoming, say, a master vampire infernomancer, is very slim.
Also, regarding vulnerabilities, I made the beasts immune for a reason, and that readon is that in vanilla the resistances are a joke. In my mod, if you try to use iron against a werewolf, you're going to lose.
EDIT: Finally home, can finish post now.
The night creature spam in worldgen is a vanilla issue, which you will encounter on most worlds with werebeasts. It's due in part to them being pretty hard to kill, and the fact that every single one can produce more of itself. Therefore the population exponentially increases. Minor vampires were created to thin out the already existing and very powerful vampire types, to provide easier opponents for starting characters. Also, existing balance? XD yeah okay. Immortal titans made of iron with no blood or thought organs is balanced. I made sure that every single on of my creatures was beatable, and I will continue to do so, because I really hate it when I have to cause a cave-in to kill something.
And honestly, more interest? Man, I made this for fun, and to fix something I thought was wrong with the game. You're free to change the mod to be more like what you want if you please, I can't stop you. I often edit people's mods if I find a part I don't like, though releasing them would be plagiarism.
Thanks for the criticism though, I'll take it into account in future releases.