I'd be open to indie RPGs that are more gameplay focused than story focused, the few I have played were pretty fun. It's just, the idea of sifting through the indie rpg steam list for a minority among a shit ton of rpgmaker games doesn't sound very appealing.
Since you like Crystal project, you can check Cassette Beasts since i'm 100% sure the exploration was inspired by it. Completely open world 3d isometric with a lot of platforming and puzzles, but it's a pokemon-like and if you catch certain mons you unlock metroidvania-esque exploration abilities like double jump dash etc. Also has randomizer and other stuff.
Another is monster sanctuary, which is just you in a 2d metroidvania world finding new mons and shit. Every mon has a surprisingly deep skill tree and their own gear so there are many viable strategies and the dev balances towards pvp.
If you like FF Tactics gameplay there is Fell Sell which is literally that but without the good story and polish.
My all time favourite JRPG is actually Lufia 2 on the SNES because of those awesome Zelda style dungeons. I know there's a few more of them out there but I wish more jrpgs had dungeons with actual puzzles and shit like that.
It's a crime how lufia 2 was never avaiable to modern stuff. If you like puzzles, Cross Code is an action rpg that has big dungeons with a ton of well designed puzzles that evolve on themselves, easily much better than any zelda i played. A lot of depth/customization on gear+skill treeand a fuckton of optional content too.
I actually since this years ago on earthbound subreddit (it had a much different style originally). I played this for an hour till the end and felt very underwhelmed. It's a really simple rpg maker game with a very slow start.
You start with an old man getting killed during a cult ritual i guess, spooky enough. Then you play a kid having a nightmare in a cave where he watches his mom disappear just like that scene in mother 3. Then you wake up and walk around talking to your family. Then you have another dream where a voice says your mom's time is coming (double redflags?). Then you wake up and must go to town buy medicine for your grandma (triple redflags??) and meet your friend on the way.

(The MC sister is kinda stupid. She is also T-posing all the time).
Somehow this all takes 40 minutes and then the Dev appears and says the demo is over but you can move in this zone and fight a few enemies for fun.

(I dont like alex design, he's wearing rubber boots but it looks like yellow pants)
I move around and kill some random things like a cultist with penguin head, a stop sign (of course) and a few animals. Also a lamp talks to me about the tutorials because mother 1 reference.

(Enemies move a bit and change sprites when stunned which is surprisingly nice but sound design is bad and songs are weak.)
There are a few more future implications, like watching TV and see the govern implant a CAIRN project (?) and Alex refusing to talk with the bully boss fight, implying some kind of past trauma. But the boss fight is pathetically easy and all you get is an AoE swipe and a reliable cheap stun for andy.

(Jimmy did this fight better and actually hard)
Your friend even says "This one hits hard, this one has AoE and this one is a leader that buffs so i wonder who we should focus first..." but then they all get two shotted. I assume its ez mode because demo but you could have one hard fight at least.
This is also such a bizarre way to end the demo cause i doubt these bullies will be important as the cult and nightmare shit. I just dont get the hook of the game or the tone for that matter. It's clearly trying to be a bit spooky but it's not edgy enough. It's also clearly trying to be earthbound but isnt even that quirky.
Say what you want about earthbound but it's a
tight as fuck rpg. In 40 minutes you wake up, find the meteor, save your neighbor, fight starman, watch buzz buzz die and are free to find mcguffins to beat giygas. That's a very strong start that tells everything you need to know. The perfect rpg demo on a game that never had one.
But at least the dev confirmed wether it's about DEPRESSION or not

(I love this whole chain lol)