Wish people would stop saying things like this, if you actually want players to improve you don't stop them from doing things which will actually make them better... you know, by getting his head up and picking people out, and choosing which moments to run at people and when to pass.
Mistakes happen, it's not the end of the world. Keep trying things and keep learning, it's really not that difficult a concept. You don't improve if you keep staying in your comfort zone and he is always pushing himself to improve, you can always see it.
He's constantly affecting games for us at 22 years old and is undoubtedly one of the most highly rated young players in Europe.
What ever this means for the future, one thing is sure, he's a mentality monster, for me he's in the same bracket as Bruno when it comes to taking responsibility and affecting games. Certainly not as vocal but players look to him and trust him in the same way and that says everything you need to know about Marcus.