I also think that Evan Fournier is criminally underrated, and if given an opportunity with a team that he fits with (Someone like Portland), he would shine.
He averaged 19ppg per 36 last year, but had an off year shooting. The year before last he averaged 15ppg on 50% inside the arc and 40% outside. He can really shoot the ball.
The difference between him and Crabbe is that he can handle the ball a little better, as well as create for himself and others. He consistently averages around 3 ast per game, but his situation in Orlando is the reason those numbers aren't better, as he's a very solid passer. He's not a consistent defender, but shows flashes of being solid, much like Crabbe.
His contract is bloated, but he's essentially what we hoped Crabbe would become. Orlando has a lot of wings, and only 4 big men (Speights, Gordon, Vucevic, Biyombo). Therefore, I would try to trade Leonard, Davis, and our 2018 1st for him. We'd shed Leonards contract, and not take on any more salary and basically upgrade Crabbe into Fournier.
I think Fournier would be great playing off of Lillard and McCollum as well as being a secondary or third ball handler. I think our motion offense fits his game perfectly and if we were able to acquire him, he'd breakout into a 6th Man Award Winner.