If he's playing Bigi for the first time in yonks when Marveaux is fit and available then I have big issues with it.
You're right about that, bear in mind Marveaux was sat on his arse and couldn't move towards the end of the Fulham game though.
Bigi shouldn't be there ahead of Marveaux but I trust Bigi to play well. Williamson will be a disaster like he has all season long.