My 2010 Golf DSG had 140k before the buyback, no issues. I put 40k on the older DSG of the 2006, it now has 220k with no issues(and I push it hard and use every bit of that 300-350 lb-ft of torque).
Changing the flywheel was more common on the older ones, but the newer ones are just as likely to have a DMF failure as a manual's flywheel. Changing the clutch and flywheel on the DSG is very similar to that of a manual, though the DSG clutches are stronger. The manual also has a taller overdrive, your cruising RPM is much lower.
Fluid changes are pretty easy and cheap if you do it yourself, but I'd go with the manual if you choose to pay someone else to do it. The biggest issue from extending the fluid change is clutch wear. Some people will go a couple hundred thousand without a fluid change, but those are the ones that usually need new clutches. I wouldn't be surprised if I have to change my clutches soon due to the power and city driving, but there's others who have over 400k on the original DSG clutches.
There's a very slight chance of a mechatronic(the brain box for the DSG) unit failure, but that's pretty rare.