I also definitely disagree, this year we've had games like Her Story and Beginner's Guide do some completely original and innovative stuff with storytelling; Downwell with its perfectly crafted minimalist twists on some classic mechanics; Shovel Knight has shown enough continuing success to get a physical, retail release on pretty much every system available, (and the excellent Plague Knight campaign); and we have Undertale, which has nearly universally been proclaimed some of the best writing the medium has ever seen.
And those are just some of the bigger and well-known successes I can think of off the top of my head, there are a bunch of smaller, lower-profile games that have done quite well for themselves.