Council Van,
The new car park location probably adds about 5 minutes to an M56 routed journey, and then the bus transit from car park to T1 about the same as the current transit.
If you are implying that the said 5 minutes would be a borderline of a safe flying duty to then turning into an unsafe flying duty, then one should probably question the scheduling of your company as to why that 5 minutes is so critical, and thus as your company are the ones paying for car parking, maybe you should ask them to provide spaces in one of the 'customer' car parks so not to impede on your flight duty given they are the ones scheduling things so tightly.
But in addition to this, MAN has worked closely with airlines so that parking then becomes easier. They are creating 2 car parks so that no staff 'have to come past the airport to go to work'.
As this will be a large construction project, surely it's understandable that some things will be slightly up in the air while it gets sorted and bedded in.