4060's definitely got my #1 most creative latching design this year. This was beyond the realm of any ideas my team threw out, and beyond what I've read/been inspired by in the past. Well done, IMO.
I really like the scaling designs by 148/1114, wherein they negate the effect of scaling neighbors by angling the bumpers completely clear of the volume the neighbors would occupy during a scale.
1418's scaling mechanism consists of a scissor lift hook that's spring-actuated, and then a direct-cabled winch pulls the hook back down for the scale. It is quite compact and fits in a neat, tidy rectangular volume on the rear of their robot. The spring has a bit of force to it, so their latching mechanism to keep it in place is the tough thing for them to solve/maintain - yet they did it very well in their 2nd competition this season. It takes them about 15 seconds to line up, deploy and scale. They solve the problem of neighbors by scaling much higher than the requirement.
2363's mechanism is pretty fun to watch. It unfolds in two different directions - think of a 'vertical flop' mechanism. It takes about 10 seconds for them to line up, deploy and scale. The deployment used to be SUPER fast.
I think 842's takes the win overall though. You just can't beat a mechanism that was implemented day-of using a crazy-simple set of parts. It really makes me want to find a spare 3 lbs so I can take the build kids through the non-trivial and ever-so-humbling venture into finding volume on the bot to put all of the winch components.