I think you're going to need to explain how /bin and /usr/bin provides more security than just /usr/bin. I don't see how it is at all like changing ports for se

I think you're going to need to explain how /bin and /usr/bin provides more security than just /usr/bin. I don't see how it is at all like changing ports for services. Packages and scripts will not (often) fail because they're adding symlinks from the old locations to the new. Other distros have already made this move, without anyone really noticing. It'll be fine.