Ok, I'm confused. In point (a) of your objection to the screen, you say it's not accessible via ECP. But when I queried your comparison to other products which don't have a network accessible reboot, you said "It is about being able to restart by using a remote." Ok, you can reboot the Roku using a remote. You can't reboot it via ECP. Is that what you're asking for?
Can something like a Harmony Hub be programmed to send the soft restart sequence (home 5, up 1, rewind 2, ff 2) in place of IR remotes? And "point-anywhere" wireless remotes?
I could then use my voice to execute the soft restart sequence using an Amazon Echo or Google Home device.