I personally think the time penatly rules are a good compromise, now let me state this.
The old rules were not being enforced, refs and players viewed them as too harsh.
The new rules are... and a five min penalty is a big deal, the players accept it, the refs give them out.. etc.
It is better to have weak rules that are enforced than strong rules that are ignored.
Its kinda like fighting was in hockey - fight, 10 minute penatly, do that off the ice and it woudl be assault.
"Unless someone like you cares a whole awful lot, nothing is going to get better. Its not" - Dr Suess