Is UNIT The New Torchwood? It'd make sense if UNIT come back to the center of the show in some way. It's not as if we haven't seen them since the reboot (Didn't Martha and Micky end up working with them, in some capacity, in the dying days of the David Tennant era?), but they had a particular authority and a particular pacifist, scientific authority at that in this appearance that I find myself thinking that they're going to replace Torchwood as the scientific organization du jour in the Moffat run and moving forwards when needed. Which, let's be honest, is pretty fair considering Torchwood deposed UNIT in the first place.
Exactly my prediction as well, the Angels will regain their original powers of sending people back in time, and send them back to 1960 s New York where we know melody ended up at the end of Day of the Moon'.