Boateng is not the greatest, but he is a lot better than some people here are giving him credit for. It's not his fault that the style and formation Barcelona play leaves him exposed. It's easy to defend when you have a settled back four and defensive cover. As Kompany is finding out this season it's not so easy to defend when you are constantly left exposed and attacking players are running at you.
The game is going exactly as expected and Bayern can be lucky that Bale is sick. Crazy how they are being exposed so badly on their right hand side when they have the best right back of the last 30 years in his prime.