You should be able to restore them yourself if you look at the old version of the page in the version history and then use the edit button and then copy the wikicode to a new page.I found that some of the old non-DLC mission trees have been overwritten so could someone with admin privileges restore those to a new pages? If I wasn't wrong the old mission trees are available when you don't have DLCs.
But as Dauth said, the wiki usually shows the content with all DLCs. If we add all the non-DLC mission trees, somebody has to maintain them. Many of the changes from version 1.35 and earlier versions are still missing on the wiki(not only on missions) and this will further increase the outdatedness of the wiki. If these are mission trees which are auto-generated with pdxparse, I can update them automatically, but some people spend a lot of time doing a human rewriting of them(instead of spending their time updating the other outdated things) and then I can't auto-update them anymore(the same goes for events and decisions).
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