@cbishop: You were asked to create the thread because it isn't his job to talk to you about this kind of stuff.
Comic related info is of course important here and it is useful but I did say there are ones that are not comic related and are literary focused, not really important here, neither are the ones where the content is focused on other media like tv, movies or games instead of how it applies to comics. As for the plagiarized text we don't credit other sites, ideally we'd delete it but the agreed upon solution in those situations is to leave the content instead of deleting it because having an empty page is bad, a rewrite of course would be better but that requires having someone willing to do it, a lot of pages have been rewritten over the years but finding willing writers is difficult. Also if a person wrote text content here and then put it on wikipedia, or vice versa, we don't want it, text content added here must be unique unless it is official text from a publisher in italics, that's the rule.
The browse pages used for filtering and searching are separate from the other template based pages, CV relies heavily on templates unfortunately, adding those features to a page like Concepts would be a lot of work, the more likely scenario would be to expand the filters on the concepts browse page (Wiki>Concepts) but it doesn't seem like a solution that you'd be happy with since it is still another page.
We barely have themes on volume pages and they still have not been able to add them to movies or series and now you want them to add them to issues? a) having volume themes automatically applied to every issue is a bad idea because of abuse, we've stayed away from bulk editing things specifically because of abuse and b) auto adding them from volume to issues + being able to add issue specific ones would be a pain in the ass to code. What we have now was only possible because of how easy it was to add a list of additional themes to the already built theme system that was only being used to tag Adult content on the site, I gave him the list and it was just done, expanding it or modifying it is a whole separate thing.
As you said you don't know what is going to be deleted, if anything, you haven't given anything a chance to even start happening before you brought up the drawbridge, torches and pitchforks. With that said you really should have spent a minute or two going over the list of themes before starting this whole thing, that list would have given a pretty decent idea of what concepts I would even be considering. If a volume ran long enough to be in multiple "Ages" apply all of them, that's why the date range is there. Variant Cover is not a theme it is an actual concept unlike a lot of them in the wiki. I thought about adding Public Domain as a theme but we already have it as the publisher for those volumes, it would kind of make sense to change it from a publisher to a theme but honestly my gut says that would leave a lot of volumes with no publisher associated which isn't great.
Now if removing Trade Paperback is such a big problem for you why not create a new concept called "Print On Demand" that can be applied to everything Gwandanaland publishes? That is an actual valid concept that serves a purpose.
"The actual issue"
I'm still not clear on that with what you said, what I got from it is that instead of giving themes a chance you are stuck on potentially losing one single concept page (or just the ones you care about) and that you want the wiki to cater to the few specific volumes you added, by adding additional features, instead of thinking about what benefits the entire wiki, of which themes do. I know you've put in a lot of work in the wiki but wiki's evolve, things get added, things get changed and things get removed, it happens.
I assumed you were going to create this thread based on our PM and that would have been fine but the fact that you bothered wcarle with all this makes me angry. The engineers are barely on the site, getting anything done is a chore that takes months to years of talking and pushing and reminding and frustration and you go wasting the little time we get with something that is not even engineering related... if you have a wiki related problem create a thread in E&T, if you have a problem with a mod contact Rorie or inferiorego, if you find a bug go to Bug Reporting, if you have an engineering problem contact an engineer.
I'm assuming the database change happened since I was able to delete most of the undeletable pages but there are still five publisher pages that can't be deleted. There are no volumes, characters, series, teams or lists associated with them but two of them have creators associated which can't be edited. Movies and story arcs can't be filtered by publisher so I can't see if they are connected and locking the five publisher pages.
@shroudofsorrow: seriously? I suggest you start reading the submission comments when your edits are denied, I told you exactly why it was denied, the page already exists, you need to search before trying to add new pages.