RU-L'Haan hid quite well her real personality and only MU-L'Haan realised that there was something off, although she didn't know exactly what. And something tells me that L'Haan's data suddenly appeared after Section 31 realised that they were looking for her; they prepared a fake file to see, perhaps, what was going on and who was looking for her and why.
I'm not convinced by the explanation how Taran'atar got through the forcefield, though.
Ro clearly has a serious problem growing and seems like she's getting addicted to painkillers. What's worse, she seems to realise she has a problem, but doesn't want to do anything about it. And she was doing so well in the beginning of the previous episode, just before the accident and temporary amnesia.
Finally, I wonder if RU-L'Haan is really going to take the katra
to Vulcan or maybe attempt to use it somehow. Section 31 wouldn't stop from using anything and anyone.