Nothing wrong with him being asked to step up in terms of seniority, he is our best player, he is our main striker. Shouldn't be a problem with him carrying that level of responsibility as he seems a down to earth lad and appears to have a decent amount of affection for the club, even only being here a short time.
It's playing him in a position where he doesn't belong that has been the problem, to carry an Arsenal parallel it would have been like them using Ian Wright as a deep lying forward. Why would they ever have done that when he did all his good work on the shoulder of the defender. It's incomprehensible why we have chosen to do that with Afobe, it's not as if he is also a brilliant creative force who can make a load of chances for us from deep, he just ends up trying to run at the defence from 60 yards out. Whether it's pandering to the player's wishes (allegedly said he got bored playing up front, though not sure I've seen a direct quote saying that) or Ken misunderstanding what a number 10 does (quite likely, as Leon and Sagbo have played there under him), it's lunacy.