You`re doing quite well as I see. I am also developing a Helbreath 2 ;p but I insteed of moving all to 3d i stay with old good 2,5d(2d) and only design maps + additional stuff in 3d and render them to isometric camera.
As u disabled PM i will post here link for you, if you want u can delete it but i wanted just to give u adress.
www.helbreath.eu/forum/I am quite sure i will be watching how your project grows.
Cheers, Thilidric.