Bingo.
This was my worry when we signed him, that many wouldn't have watched much of him and thought he was going to be the panacea to all our ills. Ndombele has a lot of good qualities, technically excellent, can drop a shoulder and move past an oppo, and can see a pass - but he's no Makalele.
It's not just that he's constantly putting midfielders into CM2's that asks too much of them, he's doing it against opposition set ups that make it even more likely to struggle.
The only times he plays CM3 (or 1+2) is when he does the stupid diamond, and plays Moura as a twin CF, getting under Kane's feet, and generally making the whole forward area shit.
Why the fuck he can't just play a 433 and be done with it is beyond me. We';ve got a bunch of midfielders that need it, and wide forwards like Son, Moura and Lamela who's suit it.