Agreed that a misconduct of match penalty shouldn't be eligible for substitution but it would be tough to enforce limiting it to injuries. B's are up 4-1 late in the second, and suddenly Donato is "feeling tightness in his hamstring" and sits out the 3rd for Accari. How is the ref/league going to check that? what if they say "nope, i think he's fine, no substitution allowed" and then he tears that hammy in the 3rd?
I guess you could make the guy who was subbed out sit out the next game as well, but that seems pretty punitive
No way to enforce. It would be based on trust
Likely a team is not going to substitute a top 6 fwd no matter how bad they are playing. Because the extra is likely not as good as player
It could also be a disadvantage to sub in a new player just cause...
1. Player new to the game and is behind in adjusting to pace/scheme by other team. Regardless how much instructed, not the same as actually playing
2. Use or abuse the sub in function , without an actual injury and if another player is really injured later in the game, your team is worst off
Another way to prevent to sub in for fake injuries would be , team would need to burn a timeout to substitute in an extra