Capcom is in a weird situation where they're both missing and...not missing on Switch. I mean, when you look at their release slate, you can clearly see there's been a major increase of release from them, including multiplatform efforts. On the other hand, Capcom is heavily into re-releasing their backcatalog alongside major releases, and the Switch is not getting titles such as MHW, DMC5 or RE2. I'd still consider them not nearly as absent as the others mentioned earlier.
Atlus is...still in the wait and see phase, since they can be so slow with transitions to new systems. At least, SMTV is in development, it's a big effort from them.
Right now, I'd consider more on the "absent" field Marvelous, Konami and Spike Chunsoft.
Marvelous as the "best one", since they have stuff coming to the system, including an exclusive like Daemon x Machina and the Japanese release of Little Dragon's Cafe, but also the main Senran Kagura games missing, Fate / Extella Link not releasing alongside PS4 / Vita SKU in spite of the late port of its prequel. Plus, since they said a while ago that they were interested in bringing both new and old games to the system, I still wonder when they may start releasing older titles such at NMH1+2 (Suda already said discussions are happening, to be honest). Actually, surprisingly enough so far we've almost only seen new titles announced for Switch, and not older ones, now that I think about it XD
Anyways, I can see Link coming to Switch next year as another late port including all DLCs (similar to the original F/E's release), and it may finally be the time Story of Seasons gets an official announcement. It could also make sense in terms of development time: the franchise saw bi-annual releases on 3DS (A New Beginning in 2012, Linking the New World in 2014, Trio of Towns in 2016), and the two-years cycle becoming a three-years cycle due to the hardware difference makes sense, in theory.
Konami and Spike Chunsoft's absence is more baffling, even if for different reasons.
Konami has yet to catch on potential other classic returns, similar to Super Bomberman R (still getting supported to this day) and their sport titles are missing the system or still releasing even on Vita. It's a strange mix of nonsense and lack of interest in the console market. All the Castlevania content in Smash Bros. is great, but the way they handheld the Castlevania collection (which is basically SIE doing the grunt job) shows that they don't care to put a bigger effort to legitimately work on a multiplatform (and beefer) collection. Similarly, I feel the lack of PES on Switch is mainly due to a complete lack of will to try to make the brand bigger: they lost the Uefa's Champions League license, and sales keep on going down WW, so they probably think investing in an additional SKU is useless for a game in a franchise they clearly don't believe in anymore on the console side. Which makes it more baffling how baseball titles are missing the system: Konami is much more involved with Jikkyou Powerful Pro Baseball (including the recent eSport league's establishment), and they're bringing back the Spirits brand on console for the first time since 2015.
Spike Chunsoft is even more no-sensical, they really seem to not care too much about the Switch for whatever reason, aside from publishing other developers' efforts. Heck, they're releasing Kenka Bancho Otome in 2019 just for Vita, in spite of the ongoing Otome transition to the Switch and the old age of the system, which would justify putting the game on PS4 as well, at the bare minimum.
