Eh, so far Nintendo have concentrated on spring/summer - so maybe there'll be more in the second-half of the year.
Wait till E3. I'm assuming you like JRPGS, given you're looking forward to Octopath Traveler: things like Dragon Quest XI, Valkyria Chronicles 4, Fire Emblem and Pokemon might be autumn/winter releases for Switch in 2018.
And no, I'm not disappointed. There's a mixture of things I want to replay (Crash trilogy (only played original versions), Okami HD), third-party stuff that's new to me (Dark Souls, Ys 8), and new titles (Mario Tennis Aces, Octopath Traveler, Splatoon 2 expansion) that'll keep me very busy over summer. I mean, that's 6 game purchases and an expansion over a 2/3 month period, which is great for me.