Interesting idea, but I probably wouldn't do it. Fournier is really more of a guard. I know he's 6'7, but he's really slender, in the mold of a Reggie Miller kinda body. Not a guy who can play almost all his minutes at the 3, and he doesn't really give you something you don't already have. You can say 3pt shooting, but why have Evan Fournier if you already have and believe in RJ Hunter?
Young's value, trajectory and ceiling is a complex and debatable topic around here, but he possesses physical tools and skills Fournier doesn't have. He has the physical talent to be a scoring wing in the NBA, and a pretty good one at that. There's a reason other Gm's were saying he woulda been a top 10 pick this year, and he's only 19. Youngest guy on the whole roster. The potential is there, and the stories about him adding muscle this year sure looked true at SL. I don't wanna include him in a trade for more immediate help if it doesn't fill our hole at the 3 long term, not yet anyway.
I like the idea though, I'm all for moving Young or any of our other young guys not named Marcus for a young, improving player with the potential to do more with us. If he's in a trade with Bradley and a pick for Barnes, I might get behind that.