I don't like the "reclaim your privacy" windows 10 apps simply because the ones I've used have made a hash of it. Maybe he one you linked to is better but I've always felt better doing these changes myself so I know what changes to undo later if they break something.
After using one such tool some months later, I wanted to use the Fast Windows Insider build to get Bash for Windows but one of the privacy options remained set and I manually had to do though every one to find the one that didn't unset. Also had friends have update issues as some of these tools black holes MS update servers.
You can turn off most of the telemetry in home/pro but if you want to turn off all the telemetry upgrade to enterprise edition.
Never had the options turn completely back on with updates. What I have had if I run Insider builds then from build to build some settings can be reset as they are basically fresh installs on top of your existing install. But never had options change from normal updates.
As for the reboot thing the default is a pain in the arse. But it's an option that can. E turned off in group policies (can't remember if you can do it outside of GPE as I make most of the changes I need at the same time in GPE)