@masa: Apparently Setsuna would, when you look back at ep 2 it was Setsuna who recruited Lyle and retrieved Sumeragi. The others had 4 years to do that but they didn't. As soon as Setsuna returned all of a sudden he was the one getting the band back together and then risking their newest unproven suit (and 2 of the 5 original GN drives) on nothing more than his hunch it would work and the fact that they were desperate. The conclusion I drew from this is CB is full of followers and without Veda they have been looking for direction and purpose (I would think this is especially true for Tieria who used to live and die by his precious Veda). Since they have no real plan or intermediate goals of their own they'd probably follow anyone who gave a suggestion that they don't find immediately offensive (like "Let's turn over all our Gundam Tech to A-LAWS").

I think Setsuna's return and his determination to take action against A-LAWS has given the rest of the crew a purpose and so they were willing to do what he thought they should, not because they take orders from him but because they don't have anything better to do and they don't disagree with his idea.