You'll have to forgive Dgibibibbi. His head is still not on straight after his favourite team spent a 1st+ on the worst goalie in the league. He was completely wrong about Markstrom last year, and he is wrong about Pospisil now. I love advanced metrics and how much more of the game that they show, but it is opinions like those that make them divisive. Markstrom was probably Calgary's MVP last year, and if it wasn't for him, the Flames would have picked in the top 5 and Tij perhaps would be a Flame today, funny enough.
Since the OP has included Desauliers and Roy in the same post, I am going to assume that he believes Pospisil is a fighter. That might have been the case in the AHL as he did take on all-comers and tried to make it to the NHL that way, but he got badly concussed a few times and almost had to quit hockey as his symptoms lingered on for a long time. That's why he actually wears a tinted visor (concussion issues, not hotdogging it). As an enforcer type, he would be useless.
I love Pospisil becuse he is a player that plays on that edge (and hopefully doesn't cross the line this year) that gets opponents off his game, but he is actually a really smart player out there. If you watch him play, see where he is going and what he is trying to accomplish, you will start seeing just how smart he is out there. His brain is elite, his speed is up there, his hands are just 'fine', however. I bet he ends up being a 40pt player, but one that makes a lot of room for his teammates, and is really difficult to play against. He is an unbelieavable agitator that everyone wants on their team (and apparently, that NJ was trying to add into the package last season at the deadline when trying to trade for Markstrom then, and was told that Pospisil is not available apparently). He is fun to watch, that's for sure. He is one of the fan favourites, and there must be a reason for that, right? The more you watch him, the more you wish you had that player on your team. Except for Dghidgid because of awkward rationales lol.
Pospsiil is a great example of a player you love to have on your team, and a player you hate playing against. A goon or enforcer he is not, and would be useless in that role.