Complete bust? No. A disappointment, especially relative to some of the massive overhype attached to him around his draft? Yes. He just never really had the skill set that made him likely to be a true play driver at the NHL level which you could see in guys like McDavid, Matthews, Hughes, MacKinnon, Eichel, etc around their draft date. He is a smart player but isn't really dynamic in any major way. Now, you don't need to have elite physical traits to be a high-end NHL player, but it makes it more likely to happen if you have the smarts that go alongside it. But, to overcome that you need to be near the very top of the league in Hockey IQ (for example Tavares during his peak years, or Matthew Tkachuk right now), especially as a winger whose game is unlikely to be complimented by a strong 200 foot game like some high-IQ centers who also win battles down low and a strong positionally.