All Herrera did was man-mark Hazard. Did that very well, but what connection does it have with struggling against technical players or otherwise?
Its' a myth actually. When Fellaini plays well, it doesn't matter whether they are technical players or brutes, he plays well. Because his job is to make simple passes and keep the midfield ticking (nothing lavish like Pogba), make some key tackles and interceptions, ensure that he is not a hindrance on counters with his immobility, and get into right positions during set-pieces.
Matic will do most of the tackling and intercepting to dispossess Silva or De Bruyne. Fellaini just needs to not lose possession, which he does well enough when on form. But we need him to be on form, and not shite post-injury.