Circling onto the other runway is fine.... but not from below the circling minima.
What configuration do you guys intend to be at for a runway approach at the circling minima? If you are not in the standard configuration for circling according to your SOP's then you have a problem. Or are you planning to take landing flap and checklist somewhere between circling minima and straight in minima if it looks all right?
All sounds like hero stuff to me. Next time you have a simulator at hand try going over the top and doing a reversal. It takes less time than you think and on some types burns less fuel than flying the circuit.