[Donut]

How about a new field element? I say they go with a bridge, and change the height limit so that robots can fit underneath it. That would certainly throw off everyone being used to the standard 60" limit. There'd just be the problem of preventing one robot falling onto another...

A new field texture would be nice, but it would have to be something with similar conveniences to carpet (namely it can be rolled up for easy transportation, and would require little more assembly then the current sticking carpet to the ground needs). Plastic tile sheets might work, except for the problem of falling robots potentially cracking it.