Coaches challenge is fine with me if they made it like the illegal stick rule of the past. You call a coaches challenge and your wrong (meaning refs were right) you get a two minute delay of game penalty. This would eliminate many challenges as a coach would have to be pretty sure he is right to ask for one.

To increase scoring I would have a Power play last two minutes regardless if a goal is scored or not. You get a two minute infraction then you serve two minutes. More PP goals would happen.
- sparky

They could just go back to the old offside rule where you can't have any part of your body over the blue line. It would cut down on the challenges. Also in order to have a penalty for getting it wrong they have to fix the goalie interference rule altogether it is so contradictory almost to the point of nonsense.

Once they do those things a) it would save a lot of unnecessary challenges and b) it would be easier/more palatable to implement a penalty for being wrong because the rules would be much clearer and easy to make quick judgments from the benches/guy upstairs as to whether it would be worth it, and finally c) a side effect of sensible rules the actual review would be much faster as well. No more taking 4 minutes to see if the guy dragged his back skate or not, but not really being able to tell because you're trying to see something in 3D while viewing in 2D. It's irrelevant, because if any part of his body is across the line it's offside.

If they want to get rid of head shots, not only should suspensions be increased, but the team must also be held accountable. For each 3-5 games a player gets suspended, take a player from the active roster (22 max instead of 23) and take a player from each game roster (can dress 19, not 20). Head shots will end almost immediately, as borderline players who play "on the edge" will never find a job, if the team knows that one bonehead move can cause the team to lose. What effect does a player suspension currently have on a team ? They bring up a new goon from the AHL and nothing changes - star players continue to get concussed. The on-ice product continues to be watered down.

c) a side effect of sensible rules the actual review would be much faster as well. No more taking 4 minutes to see if the guy dragged his back skate or not, but not really being able to tell because you're trying to see something in 3D while viewing in 2D. It's irrelevant, because if any part of his body is across the line it's offside.
- Wetbandit1

This is an improvement that would make it easier to call in real time which is an improvement. I still have the issue that reviewing only after goals, although it seems intuitively fair, is mathematically flawed and introduces an unintended bias. When I've pointed this out to statisticians or other data analysts, they agree.

Nonetheless, it's hard to explain clearly or understand intuitively. I've had a professional mathematician admit that he could do the math the Bayesian solution to the Monte Hall three-door problem, (always switch doors) but he still didn't understand it.

The "fairness" of calling back the goal has a powerful intuitive appeal, the fundamental flaws of the implementation that make it unfair are not at all obvious.

Its really not that complicated and not as big a problem as you make it seem.
- lemieux_66

How long did it take the refs to determine that he hadn't properly dragged his skate?
It happens, and I'm willing to live with it. Hockey is a game of mistakes. Always staying onside is an impossible standard, the only question is how to properly enforce the rule.

Some alternatives include
1) get it right in real time every time (this is the ideal, but also not practical right now, so forget it)
2) live with the on-ice call (The Danny Briere incident still makes me sick)
3) Simplify the off-side rule to make it easier to call, and place blue line cameras similar to the photo finish at a horse race
4) apply a time limit (e.g. to 10 or 15 seconds between puck crosses the blue line and goal line

Today, these incidents are rare, but suck the life out of the game experience. We don't want Danny Briere goals, but we also don't want PP goals a minute after zone entry called back.

We don't need a perfect solution, but there is a LOT of room for a better one.

How long did it take the refs to determine that he hadn't properly dragged his skate?
It happens, and I'm willing to live with it. Hockey is a game of mistakes. Always staying onside is an impossible standard, the only question is how to properly enforce the rule.

Some alternatives include
1) get it right in real time every time (this is the ideal, but also not practical right now, so forget it)
2) live with the on-ice call (The Danny Briere incident still makes me sick)
3) Simplify the off-side rule to make it easier to call, and place blue line cameras similar to the photo finish at a horse race
4) apply a time limit (e.g. to 10 or 15 seconds between puck crosses the blue line and goal line

Today, these incidents are rare, but suck the life out of the game experience. We don't want Danny Briere goals, but we also don't want PP goals a minute after zone entry called back.

We don't need a perfect solution, but there is a LOT of room for a better one.
- TartanBill

I honestly don't care about waiting a few minutes to get the correct call, especially come playoff time when every goal matters. I agree that always staying onside is an impossible standard however in the case of Drouin, it wouldn't have been difficult at all for him to stay onside for that play. He simply needs to drag his foot like every hockey player knows to do. I don't disagree that there could be improvements made to the rule, however many of the suggestions (not yours) would only further complicate things.

I like the idea of setting a time limit to how long after the entry a goal can be overturned. I also think having some cameras on the blue line would certainly help however there's often going to be obstruction with other players and linesman standing in the way of cameras I would think.