While I do like the camera style of BG2, I am a little surprised that they're not doing something similar to whan XCOM: Enemy Unknown do. The defauls is *like* the fixed isomeric camera, however you can rotate the camera through 90 degrees, to each 'corner' or the environment. As that is a proper turn based game also, it works very well.
I guess it needs the 'real' 3D, rather than 2.5D, to make that work? Shame really, as I can't see that anything would be lost - or would it be at the expense of the fancypants scenery?