He was outstanding in Denmark but has really struggled at Lyon. They are a mess on and off the field. Mangala struggled somewhat in his brief stint there despite his extensive Bundesliga, Championship & PL experience. Nuamah is still young and was making his first step into a top 5 European league. He wound up at a crisis club with a coach who did not particularly want him. Not ideal.
Obviously he would be a risky signing but we have to add pace. We cannot afford proven commodities in our current PSR straight-jacket. That means it will be either someone struggling or someone making a first move out of a minor league, lower division or South America. If
Moyes has said yes (and we have to assume he has) presumably he sees something he can develop.