I have no problem with Nzonzi, dude is quality but as a DM which is occupied by DDR. Look at their B2B options and you know that a DM shouldn't have been their priority in the first place.
Where they messed up imo, is it aiming higher than Cristante for a B2B. He could surprise, but I don't rate him all that highly.
He's a Strootman replacement though, as Radja hasn't been a real B2B in 2 years. Was playing almost as a CAM the last couple years, which is why his goal-assist numbers skyrocketed, and his all his defensive numbers dropped. Always looked gassed when he tracked back last year.
