I also believe that this is a very complex curse and has to be dispelled in different stages and it will have to take every single person/ character effected by the curse to realize who they are to start this process.
Yes to all you said! By framing Emma’s challenge of getting the message of many other characters keeps the show from being overly focused on the trio. Requiring everyone in SB to recall who they are in FTL could spawn many episodes where particular characters have their own set of problems with facing “the truth” of who they are and where they come from. Awakening others could create great teamwork for Henry and August to scheme how to open some closed minds, alleviate some fears and remind others they “always have a choice”. 😀