> You're making this way more complicated than it needs to be.

I don't know what you're replying to, but your "simpler" version
starts with what ron suggested and for multi-user setups recreates
the /usr/local model. Or was this to the earlier man subdir question?

No recursive binds are needed in either case. The list of binds would
be shorter with /usr/local than /opt, but that doesn't seem like much
of a win to me. Includes in /lib/namespace for each package should
make it even less of an issue. Our file server at the labs had >350
lines in /lib/namespace and the overlay worked very well.