Thanks again to
@Diabolical for the write-ups, they're a great resource!
A few thoughts of my own on ones he's commented on above, with a slightly different perspective:
Caravan SandWitch: Everything feels solid about this one, from the art style (it's sort of Borderlands, but by Nintendo) to the controls. Absolutely worth at least a wishlist if you like the genre; I think I'd rate it more a "buy" myself.
Last Moon: Very 2D Legend of Zelda, but with higher resolution art. My only complaint is that the framerate seems too low, like around 30 FPS, which makes screen scrolling, which is generally very smooth in this genre, not so smooth.
Before I Go: Art is OKish, animations need work, not a lot to make it really stand out as a Metroidvania.
Clockwork Ambrosia: I liked this a lot less. Graphics are a bit too low res - we really don't need more faux-retro stuff. Overall, felt kind of generic.
Steel Seed: Tomb Raider / Uncharted in a sci-fi world. Graphics were serviceable instead of noticeably good. Stealth was a bit vague, combat was merely ok, platforming was also serviceable but not standout, and the environment felt more empty than usual in this genre. Not bad, just not standout.
Bloomtown: A Different Story: Diabolical is right, this is a Persona-like. Even the character menu portraits are reminiscent of Atlus. Quite interesting. I think the devs are taking it in a bit of a different direction, though, since social stat gains aren't as regimented as they are in a Persona game - I ground Guts up to 8 on the second day in about half an hour (in-game time) by chasing swans around, and you'd never be able to do anything vaguely like that in a Persona game.
Akimbot: It's PS2-era Ratchet & Clank with modern graphics fighting SteamWorld bots, but Clank is Claptrap and Ratchet is a bit of a prick. Gameplay-wise, my only issue is that on controller it felt like aiming lock-on had too small of a radius, though that might be adjustable in settings.
Caravan SandWitch was the best of what I played, but
Bloomtown looked pretty interesting as well.