It's okay. It has good points. Maybe this is a 2.5 or even 3, but I couldn't bring myself to finish it, so I'm rounding down.
The characters aren't bad. The story is at least somewhat interesting - the ending probably would've redeemed it a bit, but I didn't get that far. The banter is ok but there's enough wordplay and other jokes that the MTL just cannot handle it. That's not really the game's fault, but it definitely brings the overall experience down.
The combat system is above average. An attempt was made. It's certainly better than the average slog, but the bar for combat in these games is extremely low. There's a skill system, multiple characters, and therefore you can have specializations. Best of all, 3 of the characters have unique mechanics. It's clear at least some real effort was put into this by the dev.
It's just not good enough. Battles are still boring. I started on normal and switched to hard. Even that wasn't especially difficult. I feel like the game wanted me to reset skills between dungeons, given the hints. Especially because all enemies in an area only one use status effect (afaik), and there are skills to negate status effects. So I think they want you to reset your tree frequently to prevent that. Doing that is extremely annoying so I never did it. If there's a clear, correct answer (resist Pain in the ruins, Darkness in the forest), there's no thinking involved, so it's just grunt work.
Equipment is obtained through a gacha. This is by far the most obnoxious mechanic. You get items and "appraise" to get 0, 1, 2, or 3 star equipment, randomly, with better items giving higher star items. Then you can combine duplicates to strengthen them. Different weapons have different abilities, so you can use them to further customize your characters. Or you could, if it wasn't an awful mess of RNG. If you want your healer to switch to a pure damage dealer, you better hope you get enough copies of the +dmg -heal item. If you don't, tough. Give up on your customization plans.
Actually appraising them is also obnoxious because the game pauses to show you each 0-star item you got. On the whole the menus are really annoying to deal with, because scrolling through them pauses for a bit to show a background image. I don't know why. This is a minor gripe but it got on my nerves.
The dungeons are creative, but way too big. They're a slog to get through. There are interesting ideas. They're well done. They're just way too big. There aren't enough story elements to break things up, so it just comes off as another slog, another time waster. This isn't a pay-to-win online gacha game, so it should stop acting like it.