I'm not good at this kind of stuff myself but have been enjoying reading all the different theories. Some things that bother me are 1)Sherlock seems genuinly distressed when Moriarty shoots himself. There is nobody up there for him to be acting for at that point. I think that was an actuall surprise. 2) Sherlock does not take people into his confidence easily. I've read a lot of theories that suggest all the medical staff is in on it, but I don't think he would let that many people know.. he hires homless network people to do things but he does not give them details. 3) if he texts somebody on his phone that message would be on there and surely they would look at his phone afterwards, but I guess he could delete it. I think the great thing about Doyle's story is that there aren't any helpers and its all Sherlock, I hope the writers stuck to that sort of idea, though I do think Molly knows cause she would have to do the autopsy.