What would you like to have changed or added to Vampirism

I would like to be able to go back to normal and stop being a vampire. Even a command could be useful

Does this make the mod experience more balanced?

yes

Can you provide additional resources (etc. textures or models)

no

The command would be /vampirism level vampire 0 or /vampirism level hunter 0.

In singleplayer survival there is a guide book for Vampirism craftable with a normal book and a heart placed next to each other.
In singleplayer creative you can go into the creative mode inventory menu > Miscellaneous scroll to the bottom and you'll find the Guide Book.

The Guide Book will teach everything about the Vampirism Mod, including how to revert back to a Human.
For commands: type /vampirism [press-tab] and Minecraft will autocomplete all possible commands for vampirism.

You can also look for an altar of cleansing which is generated in the church building in some villages. There you can revert in survival