> strongly against eselect modules (and any user code) that > writes into /usr (except for /usr/local)
Well, NeoVim, at least, have support for site-dir in /usr/local out of the box. I guess, Vim8 will need a bit of patching for that. Although, I'm, in opposite, dislike (very little, tho) /usr/local, since it makes me feel like FreeBSD'er.