You can't levy a "Gosling has too much personality" argument against him. His best roles feature a distinct and remarkable lack of personality in his characters, from Place Beyond the Pines to Drive.
2049 is a technically genius and stunning movie that doesn't at all feel its actual length, but the story is pretty under cooked. It's right up there with films like Revenant or Children of Men that make for amazing cinematic experiences but don't leave much room for thought afterwards. In that way, 2049 is a bit of a disappointment compared to its predecessor, but it's still fantastic.
Really not surprised at all with the domestic box office reception. Nothing about it or its marketing was targeted to large demographics.
And if you haven't seen it yet, absolutely get an imax or comparable ticket; the audio and visuals were jaw-dropping at the XD theater I attended.
Steam + PSN: PHJF