What has Bylsma proven? He got a cup in 09 for taking over a team in February that got hot at the right time. After that he has proven to be able to take a loaded roster and get ousted in the first and 2nd rounds of the playoffs. Lets not forgot Babs was far from a proven coach when hired and that worked out well.
And hell, he barely got that Cup. If Detroit was slightly more healthy that year, we would've smoked the Penguins. They were lucky, we weren't.