You are making the assumtion that somehow another player would be a better alternative. Now history tells us that is simply not true, of all the goalscorers in FC Barcelona European cup history, Luis Suarez has been the best we have had yet, regardless of scoring goals or not. Going as far back as to Evaristo in 1959 and through to Munir in present day, they have all been usless hacks, with one single exception, that goes by the name of Lionel Messi. The reality is that FC Barcelona has never had a reliable goalscorer in Europe, David Villa is a typical example of what I call a useless hack, Patrick Kluivert is another one, Ibrahimovic a third one, Hristo Stoichkov a fourth one, not to mention Samuel Eto'o, even Rivaldo whom I adore I must admit he was useless i European cup football.
It is utterly naive to belive that somehow we can just go onto the market and buy a player that will bend reality and blast through the matrix, the bitter truth is that FC Barcelona has never ever had a good goalscorer in Europe and never ever will have, with the single exception of Messi.