I agree that Mon Mothma had the conversation because she knew the driver was listening; great cover/explanation for the banking maneuvers she made. Also don't think husband was in on it.
Overall, I liked the season. I think the first five episodes were too slow. I think Disney recognized that, which is why they released the first three episodes at once - not enough happens in any of them, and they probably thought people would lose interest if they only showed one or two episodes. Ep 4, nothing happens either.
The show really picked up with the attack on Aldhani for me. From then on, even the non-action sequences felt like they had consequence.
Love Luthen's character, the depths; the amazing tricks on his ship (well, everything except the lightsaber-like laser beams shooting out of them). It had a lot of the vibes of how smuggler ships are described in the books, with false transponders, and methods of avoiding detection or capture. I loved how he had to put on a fake persona on Coruscant.
Syril's character is stupid. He tried chasing Andor (against the directives of his superiors, btw), caused a ruccus, lost his job, and was a pathetic waste of storytime for the better part of episodes 4-12.
So, he save ISB Agent Dedra Meero, which means ... what? Dedra doesn't really need character development - she is the villain, afterall. She's not going to turn good, she's not meant to. Syril doesn't help her character, and they really didn't add anything by putting her in a position to need rescue. Take him away, she's just as cunning as she should have been.
Liked the ending - Andor confronts Luthen. Doesn't threaten him, just tells him he's in. Perfect.
And of course, Andy Serkis is the most underrated actor of all time, never getting his due for playing characters where he puts his entire being into voice and motion. Loved him in this, and most of the other roles he does.
Liked the post-credit scene. A part of me thinks the death star is too far along for five years before it's completion - it looked like everything was built except the super laser disc, which, gets installed in Rogue One.
Maybe the prison-break slowed production? By a lot?