The most I would offer for Drouin is a 2016 2nd, Meloche, and Siemens. Meloche is a big, mean, right-handed shot that has top-pairing potential and was considered a top 30 prospect in some publications in last year's deep draft. He's only improved since then. There's a scarcity of big, right handed shots in the NHL, so they're pretty valuable. Siemens is a former 11OA pick that has a lot of tools and even if he doesn't develop much more, should still be a solid bottom-pairing guy and there's still a chance that he's a late bloomer and puts it all together. This year's draft should be pretty deep too, so a 2nd certainly holds some value.
I know that if it weren't for all these things surrounding Drouin, he'd be worth more than that, but the reality is no team's GM can justify trading a similarly valued prospect for him. That just screams like a "digging your own grave" move. The warning signs with Drouin are apparent now and if GMs choose to ignore them and trade for him and later on he doesn't pan out or holds out for a better contract or over a lack of playing time, it could cost the GM his job. GMs don't make trades for the sake of making trades; they have to see a reward on their side. It doesn't make sense as a GM to trade a similarly valued prospect, unless they're dealing with similar circumstances as Drouin. Why take the chance? I know some people are saying that teams that are struggling to score goals should trade for him, but he's only scored 6 goals in 95 games(counting playoffs). If a team's looking for goal scoring they're better off targeting Grigorenko, he has 9 in 112. As far as primary assists Grigorenko has 11 in his 112 games, while Drouin has 20 in his 95 while playing with better linemates than Grigs has ever had. Grigs also is a center, 6' 3", and is way better defensively. People don't seem to understand that Drouin is by no means a finished product, he's still a little rough around the edges in certain parts of his game. Don't get me wrong though, he's certainly dynamic and I would love to see him and Mack reunited, but his situation and production are causes for concern and are the main reasons why he doesn't warrant a better return.
No matter what don't trade Mikko, Zads, or Bigras!