One of the signs of a bad turbo is excessive oil pooled up in the intercooler. There will be some oil, but I don't know how explain in a post that lets you know "normal" VS "aw crap, need to change my shirt" levels of oil in there.
CCV are prone to going bad and the engine basically sucks the oil out at the top side of the engine on a lot of the 2.0T engine. And as I recall, there were some issues with the piston rings on Audi 2.0T.
So if I put vacuum on the intake side of the hockey puck it should open the valve and allow gasses from the valve cover pass into the intake manifold. what about the breather valve? how do you test that?