Actually 5 of the cattle car configured 777s show as "stored" not 13. 2 more show as "maintenance" but might be on their way to being stored. So, while not 13, still a problem. The 77K thrust Pratt and Whitney engines for the 777s are just not available in sufficient quantities and Pratt doesn't seem to care. The 90k motors can be derated and used on the older A model 777s, but the availability of those motors is not much better and they are being prioritized for the Intl configured 777s not the cattle car 777s. I am not sure what the solution to this is but until one is found, the Pratt powered portion of the 777 fleet is a problem.

I am not in Manpower Planning or Network Planning, but if you have 5 (or 7) less 777 aircraft available coupled with rumored delays in 787 deliveries due to seat issues, I would assume you would have a lower need for pilots. I doubt it would be massively less need given all the 737 and 321 deliveries, but could certainly reduce the numbers in the short term.