10 years, 3 features, wow.
I can't think of any releases in the past which have been even a small surprise when it comes to final release. If Apple were to do anything even remotely "big" it would negate the whole purpose of 4 months of developer releases so developers could ready their apps.
That's what you said and @C DM mentioned 3 very big ones aside from Apple Pay, dual camera lens, 4k recording, live photos, OIS and other hardware and software items too numerous to mention. If none of the many hardware or hundreds of software updates didn't "knock your socks" that's on you. We all have our opinions on what we look for.