There seems to be a few players who fall into that category eg Abeid, Bigi, MYM, where the belief seems to be that they'd become better players under a better manager. As I say, that seems to be based on hope rather than any evidence on the field.
And here we have one who clearly didn't see one of our best runs last season when MYM and Williamson played together.
They played together for the wins against a totally non-scoring AVB Spurs and Chelsea if memory serves. Not sure I'd call 2 games a 'run'.