And do the systems relief the pilots enough, to give them that extra capacity
I am of the opinion that there is a point where the automation stops freeing up mental capacity and starts eating into it. I often see busy ATC environments where the PM is tapping away at the FMC trying to get something to happen when really all we need to do is lift the nose and reduce thrust or something similar. Sometimes I just tell them to stop and explain how we'll do it so that they can rejoin the party.
I feel for pilots who have not had a few good years of manually flying before joining an operation that is heavy on automation because they haven't developed the skill set to the degree that older pilots have, basically it is an uphill battle for all but the most talented ones.