For those who continue to complain Thiago's giveaways,
He is not a thinker like Xavi, he's an instinctive footballer. He derives his greatness from it. These errors 'll be an aspect of his game because of the way his game is structured. He won't give you Xavi perfection but what he'll give you, is moments of gobsmacking brilliance.
It all comes with the package, my friends. Sorry if that annoys you. But some of us just appreciate and love the player, regardless.
About Xavi's speed, he doesn't need it. His vision and passing usually do the running for him.