Of course the RAF should be able to put on at least one Airshow a year, be it at Waddington or anywhere else, if only to let some of the great "unwashed" whose taxes pay for it see some of what their paying for, and like the Red Arrows they do influence people to join.
Commitments such as Guarding, OOA, deployments etc, were bandied about at Leuchars and Waddo when I was there as reasons not to have an Airshow. Didn't stop them then and I am highly doubtful it will now.
If the powers that be want an Airshow, an Airshow they shall have.
Unless of course the bean counters decide otherwise.