Prompt #1

I think I would keep the changes really subtle.  You know, the kind that make people think something is going wrong but they have no idea how to prove it.  For one, I'd have teams start to make goalie changes randomly every few games or so as if they are a player.  Quick shifts to keep both goalies fresh so as to not tire anyone out.  Id also have teams pull their own goalie on the power play to always have six on fours.  This should theoretically increase the number of shorthanded goals which would absolutely make people go nuts.  Id also have defenders taking face-offs on a semi-sporadic basis.  Nothing better than watching your 19 Face-off Centre lose a draw to that defensive defensemen with 0 TPE in draws.  Lastly, I think I'd have the league randomly make trades of players every once in a while.  Players wouldn't actually find out with a trade post, rather their would instantly be moved from one Locker Room to another without any ability to return.