I'm not sure why its a shock to you that posters expect continual growth from Draisaitl who's still only 21. There was no issue with Hall imo. He just had to be the player to be moved for a stud on the backend in Larsson. Certainly Eberle and RNH value weren't good enough to acquire Larsson. RNH's issue is his inability to drive a line. His creativity went in the ground after Eakins and RNH's focusing of playing two way hockey. Granted, McLellan did mention that they'll try to get RNH's back in his previous playmaking form, so hopefully he has a strong season ahead of him.
I'm not even sure what the hell happened to Eberle last season. Was it injuries? Shooting coach in the previous summer? New stick? Who knows..? He was just flat out terrible last season in general. Two measly assists while being invisible generally in the playoffs sealed his goodbye, unfortunately.
For Draisaitl and many other young players on this team including McDavid, Klefbom, Larsson, Caggiula, Slepyshev, Nurse, etc.. they all had their playoffs cup of coffee, and granted they're even more motivated and hungry for the cup.
Meanwhile new guys like Strome are hoping to get a fresh start with the club. A winning environment changes the complexion of the team entirely.