This is just a theory. Mothma and her team clearly are more the strategists of the Rebel Alliance. Even the decision to break Jyn out of prison in the first place feels more like their idea than something the politicians would have supported with a vote. She clearly has some autonomy on strategic matters but when it comes to putting a certain amount of ships in the sky or boots on the ground voting is required. The look of frustration on her face at the Council meeting when she's dealing with bureaucracy and standard political delay tactics during such an important moment in time was quite telling. It immediately transitions to a wry smirk, like she was ready for this. Cassian is one of her best and Cassian had a team ready to go the moment that council made its decision to delay things including K2 being briefed. Mothma was prepared for the council to drag its heels. She knows them and outsmarted them. She and Cassian had this backup plan in place but more disfunctional ensued when Cassian was also given the order to take the shot on Galen regardless and kill him when given the chance. Possible? Have I missed something?