I've slept on this. And i've changed my mind. It is so easy to get wrapped up in stats without knowing the full picture. Yes they don't read great, but he's been given so many 10 minute starts so no wonder.. Just because he hasn't been that prolific so far in front of goal, doesn't mean he won't be in future given the game time!
As said previously, even world class players' stats would read unkindly with the minutes Mousset has been given.
This lad clearly has all the attributes and talent to be a success, he's only 23 and has been chased by top clubs previously, he may need a bit of guidance and man management, but he is in the right place for that