I want to say there's a pretty healthy number of guys back from last year's team. Half the team, I'd guess, without verifying.
They seem extraordinarily deadly, when they're "on." I think they're talented enough to take down anybody. Consistency is something they've lacked this season, in pretty much every phase. Except for defense, where they've consistently made error after error after error.
It all makes me think their head isn't right, but that's just a guess. If this were a football team I'd say they have all the classic hallmarks of a team that thinks it can just show up and the other team will lay down for them. I don't know if it works the same way in baseball players' minds, but it kinda feels like that.
And yes, I wouldn't expect anyone to feel bad for them with their recent success. For the same reasons, I'm not worried about the program long term.....yet.