The whole concept of Cat A lends itself much more to a multi-crew environment - redundancy in all critical systems. The most critical system is the pilot!
In a multi-crew environment, the handling pilot can concentrate on looking outside, whilst the non-handling pilot monitors the instruments and calls any deviations or malfunctions. As a single pilot, you just cant give as much attention to either task.
If you are operating single-pilot Cat A in this machine, you have to at least ask yourself whether this is the ideal situation.