If our midfield trio was to consist of SMS, Pogba and Matic it would be the slowest midfield trio in history. Neither of the 3 are very mobile. If we were to Buy SMS, then we would need a fast CDM destroyer like Kante, to make up for the lack of agility from PP and SMS. While this is possible, i seriously doubt Matic will be dropped.
As you stated, we either need to use PP fully as a box to box player, or buy an agile box to box player to play beside Pogba and Matic. Personally i prefer Pogba playing the same "free" role he had at Juventus.
We have been heavily linked with:
Jorginho: Ball playing midfielder, with low physical and defensive abilities, but excellent passing. Him, Matic and Pogba would not create a balanced midfield trio if we where not to control the ball, which Mourinho don't want to do. Would be suitable against teams parking the bus, not on teams parking the bus.
SMS: As stated he is very similar to Pogba in most ways, but less movable and is not very interested in doing defensive duties. Having watched some Lazio games this season he looks even more lazy than Martial on the pitch. This trio will not suit against possesion based thems with fast passing and so on.
Fred: Similar to Jorgino in that he is good at passing, and not the best in defensive contributions, nor is he fast or strong. Would not help balancing our midfield.
Anderson Talisca: Again, very similar to Pogba in stature and abilities. Big and somewhat slow. Same results as SMS.
Seeing as we are going to two midfielders, then we should look for more balanced and agile players, mitigating our lack of mobility.
Our nr1. target should be
Lucas Torreira, age 22(Sampdoria; Linked with Liverpool, Atletico, Napoli and Juventus. Has a
VERY high star in Serie A). Roumored to cost around £40m. Extremely good at reading passing and player movement, and agile and fast reactions. Making him difficult to play against, like Kante is. Not the biggest or strongest player, but we have enough of those. Very good right foot, and very comfortable using his left for both long and short passing. He can also shot, dribble and unlike many other South Americans he is not afraid to get dirty or tackle. Meaning that he can play as a box to box, and also as a CMD(same role as Kante).
I predict he will be the next big thing coming out of Serie A,if he not already is. Would fit well into Mourinhos "pragmatic tactics.
Some stats comparing him to player in similar position in the EPL:
Stats comparing him to our transfer target:
Even though stats are not all, and the best thing is to watch him play live, here are a couple of youtube videos of him:
Highlights this season;
Last season;
Of the players we have been linked with Jean Michael Seri would be my prefered player. More balanced than the others, and cheaper. Would also increase or mobility and ability to press higher. And if we were to buy both Seri and Torreira we could rotate between Matic, Pogba, Torreira and Seri, thus giving Matic and Pogba some needed rest during the season. Which was not done enough this season, and was a reason for Matic dip in form.