Loved it but huge Problem..
After thinking it over, (should of been obvious after i saw it)
The whole premise of the movie ends up being the remote control device, Moriarty wanted it, the Order worked hard to make it, and build a machine around it. So the big problem is, there was no need for it, in the end we see goons of Blackwood around the machine, why couldn't any of them turn the machine on, i believe during this time they had pocket watches, they just had to coordinate with Blackwood. If the remote control was not necessary, then Moriarty would also not be involved, and well that's a big chunk of the movie there, seeing as he is Sherlock's nemesis. The writers could of written the need for the remote better.
Waiting for the sequel