You never play an rpg with difernt paths before right
Did you not see the word "completionists" in there or does your shit grammar correlate to your reading comprehension?
I've probably forgotten more RPGs than you've ever played.
This barely counts as an RPG. Its a point and click adventure at best, and a visual novel with extra steps at worst.
Also most rpgs (at least the well-crafted ones) don't lock you out of key routes (like Kates) for not doing a bunch of random unspecified arbitrary choices that they player would never know about without a guide, which wouldn't be such a problem if the game wasn't so damn long and didn't take so much time to get back to that point.
Make no mistake, I like this game, but that doesn't mean that hunting this kind of shit down doesn't get tedious the second or third time around.