I think physical, muscular, whatever defensive DM is not enough to be vice-Brozo. IMO Gagliardini can be attributed to be a defensive midfielder. But he's not a player you can pass the ball to from defence and be pretty certain he can distribute it to the team mate. We need regista capable midfielder. Physical preferable yes, but he needs to be able to play the ball. This is our bread and butter in our game as we've seen when Brozo hasn't been around.
Il Drago pointed out this problem that we need the playmaking capability. Regista role is very specific, or more like the attributes needed to be able to play the regista role in this Inter team. Some grunt DM added to this team IMO is not gonna be enough.
Someone like Anguissa would be a dream signing. If we could find such signing, it would be great. If Agoume could grow to become our Anguissa, that would be even greater. I don't know if there's potential to Agoume to be such player, let's hope he has and it pans out before we sell him so he can stay with us. I haven't watched Brest so can't say how Agoume is playing there. They are saying he's doing good, is a starter etc but that doesn't mean he would fit to our style of play.