And high-sticking calls. Agree on both fronts. One thing that kinda jumps out at me, though, is that a failed challenge results in a 5-on-3. I’m fully on board with disincentivizing frivolous challenges, but assessing a two-man disadvantage seems excessive.
EDIT: I just realized 5-on-3 makes sense considering both of these situations mean the challenging team was already about to go down 5-on-4.