Im loving my C7 so far - I have all ~30 zwave devices migrated over from Vera. Everything except my Wifi thermostats (Nest and Honeywell) which aren't supported on HE.
Now that my Vera is only doing HVAC automation it's fast and stable. So I worked out how to sync the Hubitat house modes to Vera and it works great.
I published a guide for anyone else in a similar position:
Now that my Vera isn't working hard, I've moved everything over to my Vera Edge (Vera Backup/Restore still kicks a$$ - Hubitat would do well to copy it!) and put my Vera Plus up for sale on eBay.