It would be interesting to see video of the drive in action, especially considering it didn't have to deal with a changing center of gravity w.r.t. totes. A closed frame design may alleviate some of the challenges with the long chain runs.
For a game with exclusion/safe zones, this setup could be interesting for specific robots - like 2012/2013, if you discount the balancing in 2012. Or even perhaps for a 2014 robot with a specific team/strategy mindset - after all, the Killer Bees proved all-omni was plausible in a defense-heavy game.
I'm all for reducing the number of wheels required to play
