This sounds more like what you'd like to happen, rather than actually what will happen.
Matic is supposed to give more leverage to Pogba, and to an extent Herrera to be more attacking and creative. In particular Pogba who is excellent at driving from midfield will benefit from being able to stay higher up and take charge during counter attacks. I agree that Herrera isn't the best going forward, but he's not the worst either. Not many midfielders can compare to Modric and Kroos, that doesn't make you bad. We also have Pereira who fingers crossed can make his mark this season. There's also a good proposition to be made to play Mkhitaryan in the No.10 role, with Pogba and Matic behind him and this would be for when we play against the 'lesser' teams at home in who'll camp outside their box. Mourinho is all about having options, and Matic adds a dimension to our squad that we just don't have. Our main CDM Carrick has a fantastic range of passing, but not the defensive ability. TFM is untested.
FWIW, Chelsea played Kante and Matic (Uninspiring as it gets on paper, with Moses and Alonso flanking) many times last season, and played absolutely beautiful football at times. Case in point - 4-0 at Stamford bridge vs. ourselves. The whole point of Matic, is to give our more attacking players greater freedom to express themselves, rather than being shackled to defensive duties.