I find the response on this topic usually depends on the experience and the age of the player. Speaking as someone who has played a vast majority of RPGs, I'd say there is no modern "traditional" JRPG.
Just to counter some points I see in this thread:
1) Pointless necessary grinding itself is pretty rare in recent JRPGs with the notable exception of Dragon Quest and anything based off Wizardry (which is a Western franchise that took off in Japan.). Etrian is closer to Wizardry than a JRPG, and frankly I don't find near-plotless dungeon hacks (opinionated - I dislike Etrian, would rather play something more truly nonlinear and fun like World of Xeen) to be a proper representation of what "JRPG"s are.
2) The only constant in the Final Fantasy series is that it isn't constant. There is not one title from FF1-14 that has re-used identical battle mechanics without significant changes or innovation.
3) If you haven't played The Last Remnant (or any other SaGa game minus the GameBoy ones), much of the Falcom canon (like Brandish! or Xanadu/Faxanadu or even a Ys), any of Gust's Atelier series, very few of them adhere to what people describe as the JRPG formula. The main modern culprits that still do are usually the tales series and star ocean (which are more characterised by having a vile nonsensical plot written for 8 year old children - the exception being Tales of Abyss). JRPGs innovate a lot, they just aren't always rewarded for doing so. Breath of Fire innovated and produced Dragon Quarter, which was as un-traditional as you could get and that killed the entire franchise, for example.
I find it's much easier to define the Western RPG. If the music is consistently insipid and "ambient" (I blame Jeremy Soule), the world is generally grimdark, your character looks like a wardrobe disaster because you're wearing gear for the stats, party member ages are consistently over 20, the ending is annoyingly closure-free (to accommodate DLC) and doing the main quest is frequently less interesting than all the sideshows, it's probably a western RPG.