Features and Capabilities of the site/app
As somebody who has used FamilySearch, I have gotten upset and irritated when work i have done is all of a sudden gone or changed by somebody with different research than myself. The people sometimes get extremely rude if things get changed and will yell and berate you in a private message.
My idea is to let people have individual family trees, similar to Ancestry.com, where information can be shared but does not universally alter another persons tree. Ancestry is much like that. People can make suggestions but it does not change another persons family tree completely, which I believe would be of great benefit on this site and on the app.