So, it's probably obvious from the lack of posting (a year) on the project below (isometric roguelike), but I bailed on it. I couldn't get the performance I needed on an iPhone/iPad. I think I understand why deep/hardcore games don't exist in the mobile market.
I have decided to bite the 3D bullet and embrace Unity. All my free time has been spent learning Unity3D and Blender. I love both. I may still end up making a 2D (or 2.5D) game, we'll have to see. However, I had an idea last night that may end up being neither.
I've also decided that I will absolutely, at some point, make a Talesworth Arena 2, with the primary upgrade being a free moving character & map.