Happy to do baby steps 🙂 If / when you guys add some kind of "register" option to get a count on things I'd add my instance(s), as long as it doesn't break the existing install / upgrade scripts at least!
Generally I have no issues with just clicking it away since I'm the only one that sees it. If it were a viable option sometime in the future, those would be my ideal "features". I've really enjoyed using XO coming from ESXi / vCenter at work and formerly running my home lab.
Your vision of support is similar to Nutanix's which is partially why we went their route for our server overhaul and I think it's excellent. I'm hoping by the time we're due for a refresh the hyper-converged offering is fleshed out and production ready. Though I would miss my integrated firmware upgrades.
AFAIK, you have to do manual passthrough for USB so if you want to attach ethernet dongle to a VM, you plug it in the host and turn off the VM, passthrough the USB to the VM, start the VM, never do snapshot of this VM as it will fail.