Another thought about the forecheck system is that if you start it now when the stakes for wins and losses are relatively low, the young guys get plenty of experience making those reads, studying their mistakes, and learning how to make better reads in the future when the team is really trying to win. Avoiding learning experiences isn't a very good way to learn.
I agree on giving up the blue line. It's odd though, one of the older articles talks about leaving 2 guys back to defend the blue line and then a newer one says they give it up on purpose. Plus, in play we see guys try to break up plays at the blue line fairly often - Lindgren especially stands out as someone who steps up and throws hits and the blue line whenever possible.