What would you like to have changed or added to Vampirism

This may be a nice optional alternative or additive to the blue screen effect; when the bat flight timer is reached they just glide to the ground rather than turning back into human (vampire).

Does this make the mod experience more balanced?

Yes.

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

N.A.

I think it makes sense to turn back once the timer runs out. The vampire just does not have the energy to stay a bat any longer. Flying is less of a problem.

Also implementing this is too much work for an optional feature only

Understandable, I've just been looking for ways to make the flight a bit more balanced - the current configuration option ends up dropping players out of the sky, and with a duration setting of 10 the blue effect is prominent right from the beginning, leaving no true indicator of when the player will be dropped.