I agree that there seemed to be less in-depth discussions in the pits. Perhaps that is because the 3v3 format meant less time between matches to spend wandering, or the long queuing times left pits without a robot longer at some events. Looking back, I wished I would have spent more time cruising the pits.
We showed a lot of people our "vending machine" grippers, but we had a lot of other neat features this year including drive train refinements, mast/arm mechanisms, and feedback driven control with operator jog controls (in case the pots failed).
I also thought more people would be excited about our shipping crate which doubled as our robot cart/table/pit display/coat rack. Shipping weight to our first regional - crate, robot, batteries was under 300 pounds!
Crate Picture
I think a lot of teams were concentrating their effort on scouting what actually happened on the field, rather than looking for ideas for the future. That's unfortunate because learning how others do things is a fascinating and fun part of FIRST.