Thank you Ales for mentioning Location data!!!!
I add to WikiTree mostly through gedcom files transfers. So I see a lot of various Profiles, probably more than most folks. I can't believe the amount of Profiles that have an exact birth date or date of death and no location at all. Not even country. I think the system should not permit you to continue if you add a date and not a location. Or put up a Red Warning when you go to save the data about how a location is essential to WIkiTree to help stop duplicates and for searching in general. I do think many do not have any info as the person adding does not have an exact location. The Red Box warning could explain that even a state, province, etc. or just country is better than nothing.
And yes, I know I am the bane of "REAL" WikiTree genealogists and going to WikiTree hell for adding by use of gedcom uploads. But I would say my uploaded Profiles are better than most Profiles I come across. The new GedcomPare is a boon to helping there. Do I make mistakes, yep. Only human. But I do fix em when I find em.
And while I have your attention. Not sure if Magnus passed on to you I owe you a beer or three for the Category Display Structure function you created. I love it. So if you're ever in the Pittsburgh, PA area.... LJ