Have you thought about some poll for MoI users to check which most favorite/useful commands from ACIS could be transfered to MoI3d? Offset and shell are my favorite together with fillet. That`s because I have with them most problems. Sometimes If I have problems with Rhino then I try in Plasticity or Solid Edge if it would fail too, then I would have another kernel to check.

I know that best would be correct surfaces but sometimes when I have not enough time changing kernel is a solution to save some time and have job done and It saved me few times.