Adding RPG stats to an action game always weakens the game, but despite that flaw Ys Origin has some of the best hack and slash boss battles on Steam outside of Ys Oath in Felghana and the bosses alone make the game worth playing. Each is a brutal brick wall requiring a lot of learning and retries to get all the patterns down, and, yes, unfortunately, a touch of grinding is required sometimes. There are levels you are meant to be at, as the boss time attack mode makes clear, and sometimes you don't get to those levels without going back and bashing mooks for a while. Still, at the right level, you can treat Ys like a real game and not yet another RPG grindfest.
Other problems, it's flatly worse than Ys Oath in Felghana. The mook combat is more interesting but the addition of multiple characters with different styles screws the balancing all up.
The story tells an "origin" that doesn't really ever justify itself. The priests of Ys had no grand mystery behind them and other than locking you in a dreary endless tower and throwing a lot of redone Ys 1 and 2 enemies at you, this story ends up offering no real insight to the Ys story, nor does it ever really get interesting enough to justify the freakishly long unskippable cutscenes. Oath had a bloated tale too but at least it was a rollicking good adventure. Origin isn't even that.
Still, if you liked Oath and want another helping of those amazing boss battles, Origin is worth your time. Even if the balancing is off, the variety is here in spades. If you haven't played Oath yet, go get that.