Ok, it sounds like you had the carbon cleaned and the sensor replaced, hopefully the intake issue was resolved? One, thing for sure; that is listed on your estimate, is the crankcase breather valve and this is a known issue (don't ignore this problem). I would definitely check, test and replace that if needed. This has been known, to cause a problem; where it will eventually blow out the engine rear main seal, which will cause a oil leak, unfortunately, replacement requires the transmission to removed, to replace the seal (a labor intensive; expensive repair).
Here is a video, about this valve; I think, you could do this at home and buy the part online, for less.
FCPEURO: sells this part and offer a lifetime warranty, on all the parts they sell, so it would be the last time you would need to buy it (if it ever fails again):
Audi VW Oil Separator - Genuine VW Audi 06H103495AH
Audi VW Oil Separator - Genuine Audi VW 06H103495AH
NOTE: there does seem to be some info; about the latest revision, which looks like it may need a revised seal and possible ecu software update from VW. You might contact your VW dealer or talk to FCPEURO; about this replacement part and if you actually need to do the seal, software update.
Before installing this updated breather, please inspect if your current breather has a "Clear Top" or a "Black Top". If your vehicle currently has a "Black Top" and you would like to update your breather to the "Clear Top" you will need to install an updated front crank seal and update the ECM software level at your local dealer. If your vehicle already has the "Clear Top" breather this is a direct replacement and no further actions are required.
Updated Front Crank Seal: 06L103085B
Perform Inspection Of Current Breather To See If Your Vehicle Is Equipped With a "Clear Top" or "Black Top"