Hi kjverine,
About DOF - if you render via plug-in make sure your target is in range, do it by "Look to -> Target Point" from 3d navigation pallet, to avoid shallow DOF increase F Stop of maxwell camera to 10 or even more.
I found also that film settings are tenfold comparing to what we used to in Studio (and real camera settings), so make sure you divide it by 10 when putting values.
Some general thought: even though new plug-in is a great improvement I still get better results by using Studio, from the other hand having Maxwell under ACad roof make the workflow a lot more comfortable.