Perhaps we should instead be saying I hope there is still scope for MAN T3 to accommodate RYR capacity increases at MAN. I don't believe that Ryanair is short of airframes available for MAN, but T3 is certainly short of stands for them to use.
I agree about T3 Shed, which is why I think the high percentage of flights from a decent sized base like MAN with non-based aircraft is probably significant.