I'm standing by my statement that Bartra, all things considered, was our best CB last season. It wasn't by much and Pique certainly improved but for me, Bartra was more consistent than Pique was. Keep in mind that Pique always had Valdes to bail him out and when they both went down, Bartra stepped up immensely.
Bullshit to anyone who says he doesn't have world class potential. Go check his stats. I compared him to Mascherano and Pique and considering he had close to 800 mins less than both of them, his stats were on par with theirs, meaning that if he had played more, he probably would have been statistically as well our best overall defender (I compared tackles, successful take ons, aerial duels won, total duels, blocks, interceptions, clearances and tackles lost.)
Here is the link if you want to see for yourself:
http://www.squawka.com/comparison-matrix#la_liga/2013/2014/marc_bartra/136/69/1576/0/p|la_liga/2013/2014/javier_mascherano/136/69/1579/0/p|la_liga/2013/2014/gerard_piqué/136/69/314/0/p#tackles_won/successful_take_ons_%/aerial_duels_won_%/total_duels_%/interceptions/blocks/clearances/tackles_lost#avg
If you did the same with Mathieu and Bartra, the only thing Mathieu beats Bartra in is clearances, blocks (by a paltry 0.02) and tackles lost (which Bartra wasn't far behind at all in). Other than that Bartra, was again hands down the better defender and he played 1300 less minutues!
Considering how he couldn't get a string of games to save his life in the first half of the season and in the second half the absolute circus that was going on then, those are very impressive and telling stats that showcase that he isn't just La Masia hype.
Back to my original point however: since day one I have always said that it doesn't make sense signing a CB if he isn't better than Bartra and sub par players taking his minutes away only hinders his progress and hinders us from getting the player we need out of him. Neither Mathieu nor Vermaelen are better than Bartra, so why have them? I understand Mathieu brings depth and that's why I wasn't terribly upset when we got him but Vermaelen is a stupid signing and we can and should get better quality than that. Being solid for Valencia or Arsenal is night and day compared to being solid for a team that plays the way we do.