help with utilizing varispeed with workflow

i like to use varispeed at the end of my song with automated tempo preceding it. I have to usually mix the whole song to perfection first, then bounce just the varispeed section for the chopped and screwed section. i don't typically create a new mastering project for my mixes, so my "masters" are done in my mix file. I do this out of convenience, because there is ALWAYS something that i forget to do in the mix when i'm mastering, and i have to keep going back to the old mix project...so i stopped this and just continued all processes in the same project (unless it's too cpu intensive).

I end up having to do a lot of tinkering pretty much muting certain sections/folders and what not, but i'm just wondering if there is a better way to incorporate switches in varispeed (speed AND pitch) without this kind of workflow? It's kind of a shame you cannot automate varispeed itself.