I think in general the team seems to be freer to make decisions for themselves, and play a more fluid game.
Blash is a lot like Cooper in that regard. And both remind me of coaches like Vigneault and Laviolette. Their philosophies seem less prescriptive. Babs' system seemed much less so. Other than a handful of guys (Dats, Z, Lidstrom, Kronwall), guys didn't seem free to make a play if it weren't part of the overall strategy. Hard to argue with Babs' system, he won lots of games. But I'm not sure its the right one for a team full of skill players. Guys like Dats, Z, Nyquist, Tatar, Larkin, Richards, Pulkkinen, Jurco, Green, Smith, Kindl were drafted because of their offensive creativity, playmaking ability, speed, vision, etc. Not their ability to take a hit to make a simple play. There are a million guys that can do that. IMO, taking away their freedom to create cuts down on their effectiveness tremendously.
I'm sure I'll get a thousand responses explaining how Babcock was a superstar at letting his players play, and that I'm biased, and blah blah blah. And obviously we've only got 3 games under Blash to compare, so we need to see how things pan out over a full season. But it sure SEEMS like our guys are getting up ice quicker, dumping the puck less, creating higher quality scoring chances, etc.