I'd actually be alarmed if I played a jRPG that spoke like a Hollywood movie or whatever it is that we perceive to be "normal". I'd feel like some of the secret sauce is missing. It has a theatrical style of its own that is definitively part of its charm.
Of course, even having said that, there are obviously instances of sub-par dialogue in that particularly "anime" way.
I'm right there with you. If I want The Witcher, I can just play The Witcher, there's a great trilogy of those games already out. I want a japanese game, with all the jank that might come with the package.