Dark Devotion is a pretty decent game. It just doesn't do a whole lot to set itself apart in a field that already has some very good and polished entries. If you're a fan of the genre and looking for more of that, go for it, otherwise maybe pick-up a more polished title like Hollow Knight or Salt and Sanctuary.
Katana Zero looked fun to me when I first saw it announced and I thought it might end up being a fairly shallow experience but I'm glad to be entirely wrong. This game pulled me in for hours at a time with its world and story and I can't recommend it enough if action platformers are your thing.
Treasure Stack does one thing and it does it really well. It also features solid multiplayer support and season unlocks to keep the game fresh. For a solo player it can become repetitive and stale and the unlocks don't seem to have enough variety to stand out. All that being said I would still recommend this game for anyone looking for a fun puzzle game on Switch.