i'm not one of these people that likes to put kh1 on a pedestal, but it handled these techniques and overall lore of the kh universe quite creatively as compared to future installments. it took a simple, generic story of a boy chosen to save the world from evil, and it threw in a few outlandish ideas like disney and final fantasy and keys and hearts and light and darkness and you know what? it worked. but now, i'm afraid, kingdom hearts has become nothing more than a convoluted mess of god knows what. clones? clones of clones? not to mention a clone of the clone of the fucking clone of the ACTUAL person? coming back from the dead? false memories? faking emotions? sensory overload, man. it's almost so ridiculous that i barely give a damn now.
don't get me wrong, i love complicated stories. when executed correctly, they work rather well, but i can hardly say that kingdom hearts does a good job of maintaining a complicated plot. for example, i've read your theories around the kh sections, grass, and while they are immensely interesting reads, the absurd lengths you (not you personally, but the fandom in general) have to go to in order to actually create a theory that makes sense is astounding.
just imagine if hideo kojima and george lucas had sex and the latter gave birth to a mentally defective crack-child that decided to write a star wars/metal gear solid crossover fanfiction. the result? the kingdom hearts series, especially as of late.
disclaimer: i don't really dislike the series. i actually still really enjoy it, but only in the same way you enjoy watching a spider try to escape a toilet. it's pathetic, watching it try and try again while you stand there knowing that the spider has no chance of making it out alive because you're just going to flush the toilet anyway, but deep down, you're kind of rooting for the little guy.