Paulo Thiago is one of the weakest fighters of UFC and I've been saying this since his fight against Koscheck.
He has weak ground game (the best he can do is avoid being submitted, in other hand I'm pretty sure he is the fighter with most position losses in grappling of UFC) and zero striking.
His wins over Kos and Swick were the worst thing that happened to him, no irony.
He should have started against lowtiers to build himself as a fighter. People (and media in general) created a huge hype on the guy which he couldn't afford it.