I know this is a popular excuse for young players, but I'm genuinely amazed you've used it for DCL.
He's one of the luckiest players in the premier league. Our laughable attempts at signing strikers over the last 3 years saw DCL play tens of games and gain huge premier league experience before he was even actually premier league standard. He's now played 100 league games, near enough. Most in his preferred position, at a top-half club. That's the dream. It's no surprise he's improved a bit. Managers have been forced to play him because the alternatives were Oumar Niasse and Cenk Tosun. He's been given game after game after game here. There's barely been an opportunity to mis-manage him and he certainly hasn't been.
"But he got played at right wing-back once though!!".
I think more than mis management of his career its to do with tactics - i think tactical changes, lack of tactics (Big Sam), Koeman to Sam to Silva changes all contribute to the idea that the young players should get a free pass. However, the older more experienced players should have pulled the younger players through and still done their best with assists, good chances at corners and free kicks, - basic good play, and so they need more attention on what they have not done these past few years. He's got lucky definitely, becuase if Lukaku was still here or we had signed Giroud or someone like Michy Batshuayi he would not have have played so much
The main thing for me is that I can't blame him for what he's done - he has worked on fitness, practice and dedicates himself to the club, and if he's nto improving at the rate we expect, at least he's fighting and working!