1) This is something I'm not a fan of either, hopefully the plan is for them to implement xp for dialogue later down the line of EA, but if they aren't already intending that, then they should get on it for sure.
2) Another frustrating thing tied into your first complaint.
3) The game doesn't have a day/night cycle and I don't believe there are plans to implement it.
4) The tadpole makes him immune to that particular weakness of vampirism.
5) They are going to implement more companions as early access continues. Hopefully we'll get more exotic companions in the process, I too would be disappointed if that weren't the case.
