While I am optimistic about most of our prospects, this is not really that accurate. We had guys like Zadina and Svechnikov who we still had high hopes for in Holland's last few years. Svech scored 51 pts in 74 games in his D+2 in the AHL, which is way better than Kasper is doing now, for example. Zadina had 35 in 59 as an 18 year old in the AHL, and then had 16 in 21 the next year at age 19 - if Kasper was having a similar D+2, we'd all be creaming ourselves at how great of a pick he is/was.
Both of these guys, as two random examples, were trending better at the same stage than Kasper, Mazur, Danielson, Soderblom, Hanas, etc... It's revisionist history to pretend like our picks are doing way better in the junior leagues now than they were then. I still think we'll have some good players out of that bunch instead of busts but let's not pretend like we knew all of Holland's picks were busts until they made the NHL.
Also, I still think Cossa can be a good goalie, but it's strange to see people attempt to discredit other players so strongly. Wallstedt has shown nothing but elite skill since the day he was drafted, and there's no reason to believe he has any lower ceiling than Cossa. You say if Cossa hits, he'll be a Ben Bishop type - I agree. If Wallstedt hits, he'll be a Lundqvist type. Both can be true, and even if Cossa does well, it doesn't mean that Wallstedt still wasn't the better pick.