Because they seem to be stuck in a rut (WARNING massive generalisations incoming).
-Anime art style does not appeal. Im not talking about the more "realistic" (sort of) anime style. Thats ok but not common. But the "cutesy" anime style. You know, giant eyes, silly hair, big swords - etc. Why dont they ever try any other kind of art style? Something different like they did in Dark spire or something.
- turn based combat and random battles. I generally dislike turn based combat because it disconnects me from the battle. i dont like a random number determining if i succeed or not. Random battles just piss me off when i just want to get somewhere. even pokemon got a bit much when going through the caves...
-Text conversations. They did this back in the day because of lack of memory. Having to read reams of text now just has no exceuse.
- Lack of choice in how plot develops. Nowadays this has kind of become expected in RPG games. If i am to play a "role" in a plot i should have some say in it. Even old "flip to page 2" RPG books let you do this. It would be easy, with all the memory they saved on the 2D artstyle and lack of voice acting.
Theres other things too which are less concrete, japanese culture is just quite different to western, so its all a bit alien to me.
They should really start styling them in a more western vain. Some truly outstanding games have come out because of this, resident evil, vanquish, binary domain, yakuza, dead rising, lost planet, metal gear. (Different genres i know, but roll with it). But still have the *flavour* of their culture, just it appeals more to the average westerner (me).