I think Manny is only ever truly right for a very SPECIFIC type of fighter; Tall, Long Limbed & Detestatingly Powerfull.
That's why I also believe that Manny won't really do Miguel any favours. However Chad may just be right for the job... He isn't a massive puncher but when he puts his punches together he is pretty leathal so maybe if Manny gets rid of that excess movement and works on establishing a reprepitoire that accommodates the change...?