I think this argument oversimplifies things. It can be applied to any genre and you'd get the same result: it's essentially the same game as it was however many years ago. Take FPS games for example. If you strip away the flashiness and stories of modern shooters, those games would be essentially no different than Doom. It's the little details that make a game, so if you take this and that and all these things away, then of course it's going to be the same at its core. All modern games are like that.
I'd have to disagree with you on that. Take an FPS like Bioshock for instance: just focusing on the gameplay, it's a
lot more advanced than we had in something like Doom. For one thing, while you
can shoot your way through mobs of enemies, the game encourages the player to experiment with alternative solutions.
You can...
- hack security bots and sic them on your foes
- hit one Splicer with a plasmid near a security camera to send waves of bots at them
- hypnotize a Big Daddy and use him as a walking tank and shield
- lure the Splicers into a pool of water and shock the water to electrocute them all
- hack a nearby turret
- hack a nearby first aid station, and hurt the enemies enough so they flee and kill themselves using the hacked first aid station.
And those are just some of the strategies at your disposal, all of which the game encourages you to try and find your own style with. And none of them are invalid. That's
way more complex from a gameplay perspective than we had with Doom. The genre has evolved.
"Alright", you say, "you've named one FPS. Can you name another that's notably different?" Sure I can! How about Bulletstorm, a game that's very simple in concept but constantly encourages you to use your environment and combinations of your weapons (all of which have secondary functions that work radically differently) against your enemies in increasingly creative ways? The more inventive you are and the more frequently you change how you play the game, the more points the game gives you to spend on more weapons and ammo. Simply stripping the game down to its base mechanics, that's much more involved an experience than Doom.
Alright, let's look at a game series that's seen much more mainstream success in the Battlefield: Bad Company series. OK, you march from set-piece to set-piece shooting dudes with guns. That is pretty similar, until you start factoring in sections where you pilot a vehicle. And on top of being a cover-based shooter, your cover is unreliable because any explosive can usually blow it to bits so you constantly have to shift your cover and think about your environment. Do I shoot these guys from this window, or maybe do I climb up these stairs in this house and use my rocket launcher to blow a hole in the next building over so I can leap in there and flank those goons?
Point is, the FPS genre has seen more experimentation and evolution than it's probably given credit for, just from a gameplay perspective (let alone an AI perspective, which is a
lot more complex than it was in the Doom days). I don't think it's a valid comparison to the stagnation of the JRPG.