In principle, these players are number 8 in football terminology. Quality aside, our structure will be very similiar to that midfield pairing. They are used to playing with a protective shield behind them, so this duo output together will be different than the players we have come to know at Juventus and Bilbao respectively. This is unless one of these players takes up a more restrictive role.
They are number 8s who compete for the ball more than almost any number 8s in world football.
For example City's title winning midfield duo won the ball 4.4 times a games with tackles and 2.5 times a game with interceptions.
Liverpool as a team made the most tackles in the league last season, narrowly more than Palace. Their most used midfield 3 of Henderson, Gerrard and Allen won the ball with 8.1 tackles between them and 3.5 interceptions
Ander's 3.1 tackles a game and 1 interception (in an advanced role where he needs to save a lot of energy for attack) + Vidal's 4.1 tackles and 1.2 interceptions (7.2 and 2.2) are light years away from :
Cleverley's 2.2 tackles and 1.5 interceptions + Anderson's 1.3 tackles and 0.8 interceptions
Yes they'd obviously need to learn to play together and wouldnt be able to attack as much as they have the past season. Ander was in the hole and Vidal has many players behind him at Juventus, thats obvious.
But Cleverley has had his best season defensively and still won the ball a fair bit less than either of the two. Anderson has never been very involved when we dont have the ball. When they played together, Cleverley wasnt winning the ball much either. So it'd be a completely different story.
Yes one of them would have to take more responsibility defensively, trying to spot danger and see it off but that's something we had an issue with last season with Carrick, Fellaini, Cleverley and the rest. So I dont see why its such a big deal now, with two miles better players who add a lot more going forward as well as winning the ball more often.
If we want someone to just see off the danger, we'll sign Mascherano. I don't think its the plan.