In the build team we had great teamwork and we would always be open to ideas from each other, which lead to many of our systems that ultimately led to our device qualifying. For example our laser that we used for aiming began as just something I blurted out after seeing us struggle to find a consistent starting point during testing and in the end it became a critical part of our aiming protocol. Our hammer release system was also created in a similar fashion where the build team put their heads together to try and come up with a consistent way to release the hammer.
I would like smaller groups in the future because from what I could see, the people in some parts of our project ran out of things to do and would just wander not knowing what to do. I happened to do that sometimes and I would just watch other teams do their trails while thinking of what else we could do. Other members of our team also wandered from their group because they ran out of things to do.
Just like in the JPL project I would advise myself to through ideas out there, even if they don't seem logical at first they might what we need. I would also advise myself not to put down any ideas from other members as they could be incredibly useful.