Can you please add me too, @joseph ?
I’ve been looking for threads like this, and I’m interested as well. Automating bypassing of effects seems like a really useful and efficient feature to have for the reasons you described. To add greater flexibility and versatility to creative effects processing without things sucking up cycles when they aren’t being heard.
Also along those lines and based on an earlier thread you replied to Managing Pitch Shift Plugin CPU resources , is the pitch shifter still considered quite expensive? I see references dating back to over a decade ago, but computers and mobile devices have relatively gotten a lot faster since then, so color me curious. 
Thanks for your insights.