Thanks for keeping Archy going - it has long been my sole Archeology mod and definitely the most full-featured. I look forward to seeing what the new version for 8.x and beyond will bring!
I certainly will enjoy all of our old Archy favorites and functionality return, updated for the latest expansion, but I am unaware if there are any other features from other mods that could be useful here. As Myrroddin mentioned above, new features (ie perhaps GatherMate2 support, HUD) from the likes of Archeology Helper could be nice. However, I recall that since the mod was last updated, HUD style addons were significantly nerfed by Blizz in the API during Legion, mostly to stop HUD projections/"Drawing" during raid encounters etc, so it may not be possible to implement today. I would also check out https://www.curseforge.com/wow/addons/minimal-archaeology - which is one of the last remaining up-to-date Archeology mods. I am not sure it has any features that Archy does not, but it is the closest alternative I've heard of others using while Archy is down.
Just a few words of encouragement while the BFA rewrite is ongoing. Keep up the good work and thanks again!