There are a few rule changes/additions I wouldn't mind seeing personally and would love to hear what others think as well.
1. For starters, I wouldn't mind seeing a shot clock introduced the moment the offensive team establishes a "touch" in the box.
2. I wouldn't mind seeing personal fouls changed to either 1.5 or 2 minutes and technical fouls changed to a minute. 30 secs for a man up is kind of silly. I think by doing this, it will put more emphasis on staying out of the penalty box.
3. And lastly, on a delayed penalty (flag down), why not pull the goalie to get an extra attacker on the field? Hockey does it! Here's the caveat, once the flag is thrown, there is now a shot clock to do something with that "man-up".