He looked so great in La Masia, that it is very sad to see him fail at senior level. He has been very unlucky with the clubs he has been loaned to, but that said, he should still be able to make it, amid chaos. We all know that Barca isn't a quiet place after all, and he should be able to cope with that if he was to make it anyway.
Tbh, Alena would break through at every club Samper has been - he just has something extra, like a iron motivation or something, that Samper seems to lack, by being more soft and giving up instead of working twice as hard. We can only hope that he pulls a Roberto and fulfils his immense potential, but right now it is hard to see.