In regard to the Florida thing...
The Florida teams were either going to end up the Northeast corridor, or with the NY/PA group. Either way, it would be good for them, because they get put with established, old-style hockey clubs and their fans. And, like KevFu said, that's far better economics than a division with Carolina, Tampa and Miami among 5 teams. The NHL got by with that ONCE, with the 67 expansion, and in those days, crowds were around 10,000. Totally different time.
But, in reality, comparing the Florida teams and where they played with the CGY/EDM or COL/ARZ situation is really fool hardy. The economics behind the 2 are vastly different. The only thing that is similar is that both cases have an element of north/south travel involved. And, as been stated here, north/south travel is NOT the problem.
To re-iterate....The reason for the present alignment is time zones....not time of travel. Time zones matter because of local TV exposure when a team is on the road. It would make NO sense, for example, for Dallas to be in a division with LAK, ANA, ARZ and VGK. Every division road game starts at 9:00 Dallas time. It makes it difficult for fans who are not completely immersed in hockey culture to stay connected to the team. The other reason for the present alignment is traditional rivalries. For example, even though Detroit as a city is near Chicago, and not far from Minneapolis, Detroit's fans are much more closely in tune with hating the Leafs. Thus, it makes better sense for local revenue to have the Wings play the Leafs more often.
Putting those things together:
Time Zones:
If COL/ARZ are in the Central: Arizona is inconvenienced for its local TV fans when they are on the road. I'm not sure how big a deal this actually is. The extra games in PTZ for Central teams would be few enough that it wouldn't matter. Except that playoff travel has the potential to become worse here.
If EDM/CGY are in the Central, everything is good for start times for everyone.
Rivals:
If COL/ARZ move to the Central, then the ARZ fans have to start all over hating someone. This could be a difficult situation, right after they have begun to improve, and perhaps even made a playoff round or tow.
If EDM/CGY move, then they lose Vancouver, but they gain Winnipeg. Calgary fans, I know, much prefer Vancouver.
That's the equation. Has been from the time the Seattle thing started until now. It won't change.