Even I don't do the crossword or finish my breakfast on a SID out of London when you haven't even passed BPK! Maybe you are experienced on the Bus. Boeings seem to require more button pressing to get things done. I think the philosophy may have been to give you more time not to make a mistake. A very heavy jet not all that manoeuvrable- a minor mistake, peculiarities of the FMS......not everybody in the world is always up to your speed!