Yeah I still think the easiest hsc year for extension 2 was 2006, but that might be because 2017 was literally one of the first past papers I ever tried doing for X2, and I wasn't as confident with circular motion yet, so that question did throw me a bit, but I see it is pretty generic now. Everything else was pretty easy though, especially 16 b), what were they thinking putting that as one of the last questions? Definitely quite a step down from almost every other extension 2 paper. Extension 1 and advanced 2017 were absolute jokes though. I swear the advanced one had no band 6 worthy questions, and the only even slightly difficult one in the extension 1 was question 10.
Btw DrEuler, I see on your profile that you got a state rank in ext 2, which year was that in if you don't mind saying?