[Thermal]

Bouyancy is still an issue, and you'll be even less stable in water than you would be on land. CoG plays a much much bigger role in a water game than it does on land because if you tip over on land, you just flip the bot back over. If you capsize the bot in water, all your electronics and motors just went for a drink...

In the end, $$$$$$$ will prevent a water game. I couldn't imagine the frustration in the pits when 5 or so teams are out of the competition on friday alone because their electronics wasn't waterproof to the point that it could take total submergance.

A water game is just too hard to build a bot for in 6 weeks for all but the best teams. If you want to make FIRST an elitist competition, then go for a water game with brand new electronics and coding. If you want FIRST to be available for all to compete, then you simply cannot do a water game.