None of current midfielders in Real Madrid are THAT creative. They have a mix of strength and stamina, but not so much creativity IMO. Arda is very creative but he's more of a wide player, while Brahim is just meh. Not that good tbh, he will never be a starter, no matter the coach.
Not a realistic situation right now, but I said they might give him a shot in the near future. He's shown that he's able to play in a couple of positions and he's doing it pretty well.
I find Bellingham to be overrated. He gets way too much credit, which I think it doesn't suit to what he offers in the pitch. He's such a moody player. Valverde is a great asset for the team, because of his versatility and stamina, but honestly don't think he's THAT good. I told my friend whom is Real Madrid fan, that their team will have a serious issue finding a proper playmaker once Kroos will retire.
Real Madrid's issues are quite obvious, and that's why they're getting exposed in particular situations. They're winning matches mostly on individual brilliance. Not exactly similar situation to Milan's Scudetto season before a few years, but there's a similarity how they've won matches and also title eventually.