I enjoy the tests I'm doing with MoI so far. But there are some commands that IMO feel like falling behind the other nurbs apps. And note, I appreciate the "lean and clean" nature of MoI. What caught my attention is how some of the commands work though.
One of those is Revolve. It is super basic - in a bad way. It does not offer any interactivity - you need to know exact angle value when you launch it. And when you're designing something and you're not working with the exact plans this really breaks the flow. When you're looking for the right shape you don't know whether for example 23 or 27 degrees angle will be the correct looking one.
Some sort of interactivity (like in extrude tool for example) would come a long way.

https://vimeo.com/351050053

Lastly it would be great if it could take nurbs patches as an input (like extrude can). While I think I can script it (by combining script for MoI's library that selects boundary with revolve) it would come a long way if Revolve could do it by default.
Hope you don't mind my thoughts on the way MoI works ;) .