I'm not sure if the OP edited his post, but I'd be geniuinely surprised if Petry gets a lot more than 1st + the equivalent of ~2 2nd rounders in Brooks and Rasanen.
Hainsey, while not valuable to the Habs, is important for our team as well.
You two need to re-evaluate what you can expect to receive in a package for Petry. He's not getting much more than a late 1st+....maybe (and this is being a bit optimistic IMO) a bubble team that's going to pick in the teens might give up their 1st in the teens.
Also, the package your criticizing is already richer than Hamonic's deal at first-glance (save the Calgary becoming a lottery team aspect)......for a player who is older, and makes a lot more than Hamonic.......and for a deal that in hindsight, looked pretty terrible.