I don't think it's lots of depth honestly. For the 3 central midfielders we have: Modric, Casemiro, Kroos, Kovacic, Isco and James.
If Gomes comes, it wouldn't be that weird if Real would sell James or Kovavic.
That said, I like Gomes a lot, he's a wonderful player, but I rate Pogba higher and this makes his transfer to Man Utd a given. Which is a shame honestly.
And let's not forget we can't sign anyone for the next 2 transfer windows, Real and Atletico already said that they don't have much confidence in the appeal.
But if Gomes comes, we have signed 2 good players for the positions that needed a backup imo (striker and central midfield).
If Nacho goes I would expect another central defender and that's gonna probably be it. Seeing the squad Real has, it's a good mixture of talent and experience.