We didn't have injuries, that's why. Next season could be different. And also, Iniesta played last season about 45% of all minutes from La Liga (around 1600 from 3400). Rakitic played around 60%. Rakitic didn't even play in one of the 2 clasicos from last season. In La Liga, Lucho rotated a lot in midfield, and you could be sure that if Arda is signed he will play as much as Iniesta and Rakitic, or very close to their minutes. I like Rakitic a lot, but he, like Iniesta, is susceptible to poor form. We have a light squad. We need reinforcements, and I'm not talking kids like Samper.
If not Arda, I still want any world class midfielder for the next Season.
Iniesta+Rakitic aren't enough.
I personally don't rate Rafinha too much, plus Samper has yet to prove himself on a senior level.
So, we currently have only 2+1 players.
Not only because of injuries (where we were extremely lucky this Season), but because of an accumulated fatigue.
We can survive one Season with a thin squad and with playing the same 11 over and over.
But history has shown that such teams usually pay a huge price in a 2nd consecutive season with doing this.
The first Season sometimes turns to be awesome, but a 2nd season is usually struck either with injuries or a team totally losing batteries in the 2nd part of the 2nd consecutive Season of playing with the first 11.
On one hand, we will lose the team's chemistry with some rotations.
On the other hand, without rotations, we can't survive the 2nd Season in a row with the same "trick".