I had some fun, but I REALLY hope that in the future rules involving the Endless Beta are changed.
I would think that someone being unable to play a character that they have practiced for three months on would take priority over someone "not feeling comfortable" playing in the beta. Do they have anyone to blame but themselves if they haven't been following Big Band and didn't bother learning how to play against him?
If the beta was just Big Band then you would have a fair point. Last I checked however, there's been a good amount of experimental gameplay changes in the beta that can almost certainly throw someone off their rhythm so to speak. If the other person hasn't kept up or what have you, it seems unfair to place blame on them when they don't want to be in an uncomfortable position in a tournament.