When I was searching for GTIs the majority of DSGs I looked at hadn't had the oil change done, so this is noting unusual IMO. The cambelt and engine servicing are the most important.
If it drives well and is priced right then I'd say go for it but get the oil change done ASAP. The reality is you're unlikely to get any goodwill from VW on a car that age/ mileage regardless of what history it has, so I don't think that argument against it is relevant myself.