The way I see it, there is a market/niche for another pro-league, you could do some different (or old) stuff. I don't like the 3on3 so much, it's too gimmicky.
There is lots of players who've aged out or just never got more of a chance in the AHL/NHL. NHL careers are short for regular players now 27/28YO as a 3rd/4th line/pairing guy is common for cheaper/younger players.
If the money is there, it's better then playing in the KHL for sure, more money then the AHL as well.. so it's certainly enticing if the moneys right.
Ticket prices need to be comparable, maybe a touch higher then the secondary professional sports leagues NLL/CFL etc...
Mind you, the NHL isn't expensive outside the major US/Original 6 cities, still cheap to go to a game in Dallas, Florida, Tampa, etc.. compared to Toronto, Edmonton/Calgary, and Original 6 market.
I think it can work, but can't be too gimmicky. I like 3on3 overtime, but not all the time.
What rules would you guys want to see? I think the games good as it is.
If you could make "Playoff hockey" all the time, it would be good, hitting picks up, intensity picks up. Ironically, putting in the redline again, does increase traffic as such.
I would also cut down on whistles, you notice in the playoffs they go 7-8 minutes without an offside or icing because puck possession is very good in the playoffs compared to the regular season in the NHL. It's a better game to watch.
Keeping things "moving" like in an NLL game would be good, like just having to regroup outside the blue line, but you can keep possession instead of the whistle blowing. (could put a time limit on it)