I say leave things the way they are.  Perhaps add something to the
metaservers HOWTO that comes with vanilla source, something to the
effect of "email metaserver maintainers X, Y, and Z if you are not
active in the development community and would like to list a server on
the metaserver", to encourage more communication between server
people and metaserver people.  This should help with the issue of
people putting up bad, laggy servers without really being involved
with the dev community.

There's also the issue of metaserver being open to the attack vector
of solicits from multiple servers on multiple IPs, but it hasn't
happened and probably never will at this point.