I am still very wishing for a cool list of userscripts that should be VERY EASY to update.
I don’t think this huge topic is very convenient. I don’t really see a listing, over there.
We already have some topics here, and one is quite similar to the Picard script topic, I guess: A new MusicBrainz user script was released
So for a userscripts listing.
I first wished an automatic listing, it would certainly be possible to have a batch that would take the list of GitHub repos to include and generate a list.
But as a more immediate and versatile solution, here is what I suggest:
Where
It should be easy to locate and to link to everyone.
I think it should be in the MB Wiki’s most clean userscripts entry point: Guides/Userscripts.
Content
It should be the easiest possible to maintain:
Just the content of name and of description, straight copied from source code.
And the URL.
Maybe for the name, we should remove all mentions of MB or MusicBrainz, to keep only what is specific to the script (all scripts are related to MB).
For the URL, it could be always the source code (we explain to click Raw button to install).
Or maybe it could be a kind of homepage / support topic / documentation, but only if it does contain a link to source code, at least.
I think indeed we should not include version.
In current list over there, I am reluctant to edit it because of the categories (Must have script, super great script, etc.). It’s fun to have these categories but how would someone know where to put this or that script? 
I think well yes we should keep the separate Importers category as it is!
It is more easy to identify than any other categories.
I think besides Import, it could be a unique list and the user would just Search in page (Ctrl+F) for what keywords they need.
@colbydray list is very nice also but IMO it contains too many columns that would just slow down maintenance and are not that must-have, when we already should read a proper summary from the description.
Even author, I think, should not be listed.
The source code of the Wiki page should be the most minimalistic possible.