Just been talking to someone who makes the point that Niasse has vast amounts of untapped potential and with hard work and good coaching could be a better player than Lukaku in a couple of seasons. Has the build and speed, the ball skills can be worked on, his attitude is good and he has football brain.
Psychologically he has shown a good attitude and mental strength and will learn from the experiences of the last 12 - 18 months.
However, he needs a regular start and if he gets most starts between now and the end of the January window we won't be looking for a replacement for Lukaku any more or relying too much on DCL given his young age. DCL might learn much from Niasse.
Was the person you were speaking to just checking into a mental health ward?