McDonagh clearly had work to do on his game though. The pace of the NHL was way to fast for him during the pre season which was clear as day. Those are one of the instances where it makes sense to send him down (And I don't think he really out played either of those guys.) I mean I get what you're saying, but it's kind of disingenuous to compare what McDonagh did at camp vs what Hajek has done so far, McDonagh struggled, Hajek has not been perfect, but he's performed very well, whether or not that keeps up remains to be seen.
Then there is comparing current Staal to 2010 Eminger/Gilroy and the end game goals of that team compared to this one, but those are really different discussions entirely.
Hajek has clearly been better than the rest of the LD thus far (sans Smith of all people, who played well in his one game.) The speed of the game has not been an issue for him so far, that may change as he starts to play rosters that are a little bit more full (Though he more than held his own last night, albeit against a not so great Islander squad.) Now again if its a difference between playing 22+ minutes in the A vs 12-14 minutes at the NHL level then yeah, send him down but I'd rather see him get 18ish minutes at the NHL level than sent down to the A if the coaches are willing to do that and the pace of the play doesn't get to be too overwhelming - most of the issues he'll have if he can keep up are going to be things that can be fixed with experience, I'd rather have our staff up here helping him through those things than the people down in Hartford.