I think the brilliant thing about data explorer is that you can perform these kind of checks ad hoc without the need to wait for any new features to be developed and implemented. 
It’s very helpful when community members do flag (or just reach out) and let you know if something isn’t right, but ideally I think it’s nice to do a bit of checking as well to save them the effort when you can.
FWIW There is a search option for in:wiki, so you could do #community-wiki in:first in:wiki, but that’s no help to find which ones aren’t wikis. 
Another possible feature request could be to make it more like the topic timers, where any topic moved to a category with a default timer inherits that timer. So a category with ‘default wiki’ would apply wiki to the first post of any topics moved into the category as well as topics created there.