I vote for your son on this one
But it's close.
I like the new season very much. Before, it was getting a bit too big - large story arcs that didn't really make any sense, saving existence itself in almost every episode, etc. Now it feels like they're concentrating more on individual stories, and that's good. By the way, the most recent episode - Crimson Horror - is one of my favourites from the new series. Spoiler coming, so stop reading now if you haven't seen it yet: I like the fact that the alien isn't the manipulative monster, like it's so often the way.