I've been using FamilySearch for quite some time now and I love using it. However it took me a while to figure out the logic behind its functionality. From a UI/UX point of view the website could use an overhaul. Functionality isn't always easy to find and sometimes even counterintuitive.
Again, I'm a big fan, but I really would advise you to have a specialist analyse UI/UX as there's room for improvement.
Keep up the good work.