Agreed. He has been a world better than keeping Ansu for example.
Just that he probably wont be worth his salary cap impact next season.
But after his wage lowering at Atleti, I'm unsure how far his real wage will be from how much LaLiga calculated for us this season. Maybe not much.
4M salary cap hit for Felix is good tbh.
Context matters tbh, players like Rafinha used to have bigger cap hit. 4M cap hit is for an above average player for midtable team, or end of the bench player in Barca.
Now, if this is the cost of a new loan, do it.
If it is North of 8M, move on. Between those numbers you gauge the market for cheaper alternatives (should be done anyway).
Under any circumstances, it should be always a dry loan.