i wanted to suggest that you keep the single player mode a separate entity from the multiplayer parts of vaulderie. i'm not sure how many different formats of multiplayer you were planning on implementing. from the UI concepts i've seen your typical multiplayer styles like deathmatch, but from reading other updates it also sounds like you want to make the game play like an mmo.
i ask because as a speedrunner i would like the opportunity to run bloodlines on a new engine. i'm sure you all know how broken bloodlines is - it would be cool to run the game on a stable engine with a new route, quirks, and possibly new glitches or exploits. then again, if your goal was to create an mmo within the bloodlines story, then running the game might not be all that viable. it really depends on the direction you want to take it.
i'm stoked to see how far this project goes.