Octopath's success is particularly significant as it demonstrates that a third party Switch exclusive can achieve breakout success without having to borrow one of Nintendo's IPs.
Ya I expect to start seeing more and more mid-level exclusives coming to Switch, especially from Japan.
That's what I hope to see more moving forward. Exclusive or not. There is no more hiding for the AA Japanese third party developers or even the AAA third party developers like Square, Capcom, Sega, Level 5, and Namco Bandai. Ports of good games are nice like maybe Persona 5, Soul Calibur VI, or whatnot, but some more original, new games with good care and marketing like Octopath Traveler and, hopefully, Shin Megami Tensei V and Yokai Watch 4 can also do wonders in building the Switch third party library. Xenoblade Chronicles 2 shows you can make an ambitious JRPG for the Switch while Octopath Traveler showed that original third party games can find success on the Switch.