For pro mainly its just a new experience and levels the playing field between rookie teams and veteran teams.
CONS:
every team would need to get a huge vat of water of find a local pool that will hopefully let them use it.
Also FIRST would need to have a huge water field that could be movable and refilled at each even but then you have issues with leaks and the fact that all that water would add up to alot of $$ in the end.
