Settle down, please! Amorim would do the same at Sporting CP, he is not flushing his principles down the drain or succumbing to some form of player power.
The central centerback would advance to form an impermanent pivot with the holding midfielder, leaving the left centerback and right centerback behind. The central midfielder would advance to form an impermanent pivot with one of the No. 10s. The other No. 10 would advance to form an impermanent pivot with the center forward. Depending on the positioning of the wingbacks, you could describe this “formation” during build-ups as a 4—2—2—2 or a 2—4—2—2.
10—CF
CM—10
CB—DM
WB—LCB—RCB—WB
10—CF
CM—10
WB—CB—DM—WB
LCB—RCB
A lot of coaches do this because you get overloads and advantageous passing networks through the middle portion to quickly progress the ball up the pitch (without resorting to low-percentage long balls). They would also build-up with what could be described as a 4—2—4, a 3—2—5 et cetera.
P.S. This is what people allude to when they say you need specific profiles of players in key positions if you want to play Amorim style of football, Gasperini style of football, and so forth. If the goalkeeper is not good at splitting the wide centerbacks to form a 3 at the back, there are going to be issues. If the central centerback is not good at advancing up the pitch, there are going to be issues. If the wingbacks are not high-octane and good with their positioning, there are going to be issues. If the defensive midfielder is not good at pressing aggresively, there are going to be issues. And so on. Even small imperfections can have a domino effect, and adversely influence the team.
