In 2010' Inter knocked us out, in 2009' we won 1:1 on away Goals against Chelsea with Iniesta's Goal in the 93rd minute.
And Chelsea also had a 4-5 penalty kick claims, right?
In 2012' we were knocked out again by Chelsea's bus.
So, we played better back then, and had our top players (Xavi, Messi, Iniesta) in their prime and we also had huge problems with buses.
Today, our players are not in their prime anymore and our opponents have evolved their defense (buses and counterattacks) against us even more.
But we don't "want" to change/evolve anything.. If you get my point?