I don't really mind it now that any unsuccessful challenge leads to a penalty. But if you wanted to further cut it down, just bring in some "immediate and direct result" language - i.e. the offside matters if it's a goal off the rush, but not if possession has changed or a bunch of time has passed while the attacking team sets up. They had this rule for hand passes and pucks off the netting not being blown down (i.e. a missed stoppage) at one point, I think it's changed since for whatever reason.
The other (or an additional) method is to place a time limit on coaching challenges - you have as much time to make a challenge as you do to make a line change, and we're not waiting for you to make up your mind as you stare at an iPad and go frame by frame through the play hoping to see something or wait for your video guy to call down and give you the green light. If it was immediately obvious to you that the refs or linesmen missed something, and you can say so immediately, you can challenge. You have about 15-20 seconds before we drop the puck.
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