I’m not sure how related this would be to your requests, but I was thinking it might be able to help your workflow regarding frozen VSTi’s. I know it would help me if I had a key command to Freeze a VSTi, create a couple audio tracks and import the temporary audio file from the freeze folder. I was thinking macro so I did a little research on the web and came up with this link.
http://www.soundpunk.com/topic/2638-cubase-macros-tutorial/
I’m not sure how relevant it is to your working process, but if it helps to remove any steps, then that is a good thing!
Cheers!