I think it all comes down to the players you have in your organization. If you have small forwards, dump and chase is not favorable unless you're playing against a defensive squad that lacks mobility but in today's NHL those are rare. Now with the way the NHL is being refereed, there's no point in doing a dump and chase when you have small players, the penalties barely get called and they wear out as the season goes by. I think Martin's system (at least the idea of it) was smarter than what Therrien has in place right now. Martin never got to have two excellent puck movers on the team at the same time. Now I don't know what changed from the first 30 games of last season to now but we play a different game. A lot more passive on the forecheck and last year the transitions were a lot faster. We play almost a collapse style in our own end (partly the reason why Gorges hasn't been brutal this season) and the identity that we had last season is now gone. That stretch last season was the most dominant stretch I've seen as a fan. We were not only winning, but we were dominant and we were outpossessing other teams. We can't say the same this year. I don't know if teams have figured out our weaknesses and are capitalizing on them or the player's are just tired of Therrien.
I think what Therrien has in mind is plays like the one Eller makes on this goal: Now obviously it took practically a perfect shot to beat Lehtonen but I don't know why we don't see plays like that more often on the PP or at ES. It can lead to a) a shot like the one Eller took b) a 2 on 1 if one of the player gets in a favorable postion or c) puck carrier goes behind the net and a player can crash the net.
I think in today's NHL what makes a team better than another are their depth up front (you don't need any superstars) and their defense + goalie. You need a balance of size and skill. I think the team we need to follow isn't Chicago but teams like St. Louis and LA. We have some similitude but we have a lot of work to do to compete with their depth both on defense and offense. We have some elite talent in all positions (Pacioretty, Subban and Price). Those teams have guys that they groomed but they also have a lot of guys that they either signed or traded for. Bergevin can't rely solely on building from within because while the DLR/Hudon/Tinordi/Beaulieus of our prospect pool are developing, Plekanec/Markov aren't getting any younger.