I cannot really comment on most of what you say, because I haven't been around in the "golden ages" that your posting imply was the distant past for Perlmonks.
But let me tell you that for every community, it is normal that part of the old guard moves on (and sometimes returns briefly, sometimes not), and new people join and bring new life. For you it won't be the same, since you have grown fond of the old guard.
Anyway, bemoaning the goold old times won't bring them back. What steps will you take? Will you spread humour and tolerance? If so, I'll gladly follow your lead.