overachieve, imo.
even if he was considered a borderline generational prospect, you honestly can't expect any prospect to do what he did. like if you were drafting even 18 year old gretzky, mario, lindros, or crosby and they equaled basically bobby hull's career achievements, you'd say you'd be happy with that.
three MVPs, a scoring title, a record eight goals titles and counting, a three year peak where he was easily the most dominant scorer (in goals, points, goals/game, points/game), leapfrogging sakic, robitaille, selanne, mario, yzerman, almost certainly messier, probably gartner, and possibly even espo before his 35th birthday even after losing a year and half to lockouts, captaining and smything a team to the cup, that's an impossibly high resume that you can't expect anyone to come through on. for anyone you'd be pleasantly surprised.