FCBarca
Mike the Knife
The problem is that Erique used him on the wing in 4-3-3 and I don't think this is a good idea. He also used him as a RM/LM few times when Spain played 4-1-4-1 in qualifications. I am from Croatia, so I have watched him many times with Dinamo Zagreb. Olmo played his best games when he was used behind one or two strikers. This is the reason why I sad that 4-2-3-1, 4-4-2 or even 3-5-2 would suit him better than Barca's 4-3-3.
He was great with Pedri & Busi and played effectively as a false 9 - coupled with Ansu & Memphis it would present many attacking options
I like Olmo a lot and would love his return, just wonder if money might be better spent on Adeyemi should he not remain in Germany - on balance however, Dani would be a great fit for a number of years and represent a return to La Masia model where only 1 or 2 big foreign signings would be a target (i.e. Haaland)