It's all a matter of perspective. Real after pocketing so much money could for example replace Benzema with Lewandowski. Did they do it? No. Would their fans like that? Definitely yes. Would it further improve them? Yes.
Liverpool need a lot of players, defenders, central mids, a CF yet they did not buy any. A lot of people could say they need a much better keeper as well.
Tottenham already strong? I guess they could do some signings in order to improve their chances for the title. Yet they don't do it.
Barca maybe will buy but so far they did not.
Juventus secured the replacements for Alves and Bonu. Alves was basically a RWF here and we brought both Costa and Berna. Maybe Keita will also come in. For Leo we have Rugani ready to step in.