Actually, the permanent patch has a test run that will evaluate whether installing it is safe or not, then does the actual installation of the patch; it's not really that dangerous or has caused many bricks. iirc, the only pro firmware that caused a brick was on pro-b10, although it's already been fixed and released as pro-b10fix1.rydian you should also warn users about the permanent patch it caused many bricks, note you have to unistall it before updating pro or removing pro or updating the official firmware.
Uninstalling the permanent patch before updating has been disproved by some members (prowler_ and some other members, iirc), so you don't actually have to uninstall it. If some people feel uncomfortable updating while still having the perma patch, they can just uninstall it. You'd probably want to uninstall the perma patch if you're updating your OFW, though.
Uninstalling pro prior to updating isn't needed either, but for cautious people, they can (optionally) do that. As for uninstalling before updating OFW, I'm not quite sure about that.