Orange Arena is the latest experiment in the Aces High II game, which is definitely a change from the previous arena configuration. So, by this fact the orange arena is a change, a new way of playing Aces High.
Orange Arena is also the place where a ".f Betty" seems to resolve to as of late, or Late War Orange, as the case often is.
So, Betty is spending her time in the new, changed arena, and yet she is upset about the changes. This is merely an observation, not meant as provocation, but merely for contemplation.
Despite the irony of her remarks, she does have a valid point, although less than tactfully expressed.