Pique didn't have a particularly good season, that's true, but I still think he fits the scheme of things well at Barca. He does better with someone like Abidal in the team. That being said, other than Alves, Xavi, Iniesta, Villa and Messi, nobody's beyond being benched in the team in light of players who deserve a chance. Pep gave opportunities to versatile defenders like Fontas, Adriano and Enrique to assess the team's depth. That has always been his style usually in non critical matches.
"And do not curse those who call on other than GOD, lest they blaspheme and curse GOD, out of ignorance. We have adorned the works of every group in their eyes. Ultimately, they return to their Lord, then He informs them of everything they had done." (Qur'an 6:108)