Dream scenario for Nylander is a 80 point center as opposed to a 65 point winger.
Kucherov is also a point-per-game playoff performer, with a knack for heroics. TB fans barely think about the regular season with Kucherov (don't be surprised if he tops 75 or 80 points this year though, given that both of his linemates spent big chunks of last season injured). It's all about the playoffs. Imagine Phil Kessel with a much, much better defensive game. (Kucherov is no Selke candidate, but his defense compares favorably to most offense-first wingers in the league.)
What it comes down to is Kucherov is our best forward right now, no question. Leaf fans probably believe they're going to wind up with 2-3 forwards better than him, but it's unlikely to happen. (I mean, you're talking about your 2C scoring 80 points. If that happens, you're looking at a dynasty, so congrats.) TB is a very, very good team, and Kucherov is easily the most dangerous offensive player on it. Drouin miiight change that, but Kuch has shown signs that he's yet to reach his ceiling.