Offer sheets are rare in the first place but players like Petey who is going to get paid one way or another usually don't sign offer sheets unless they are far apart in negotiations and another team comes in with a very good offer. For whatever reason, teams don't sign players to offer sheets unless there is a high probability of the other team not matching. I don't know why, but it doesn't seem to be used as a weapon to screw with another team's cap structure.
So while there are teams that could potentially do it, you also have to consider the fact that if the Canucks don't match, that team is paying Petey the 3rd highest dollar salary for his RFA years in the league without buying any UFA years. On top of that you are giving up two 1sts, a 2nd, and a 3rd. We talk about wasting our core players' prime years here and it's going to be the same thing with a lot of those teams who have accumulated a lot of prospects/young talent but are realistically years away from contention.