Well, for me the evidence is the game so far and specifically this latest release: If you don't like the dark content, it get cut out. Ok. But no content for the normal corruption route was added. You only get the cuttet version. So of course the main focus is the dark content now! Also: what love route? Havn't seen really any. Probably an even more cutted game?That is all assumptions based on little to no evidence. These things have been in the planned tags for a while. I'd wager the special stuff (rape/beastiality) in this update was just optional stuff for a darker corruption path, not a new primary focus of the game. Again, these things have been in the planned tags for a while. The path of the game hasn't suddenly changed.
And the game already has routes. A normal corruption route. A more loving route (also in the planned tags). And now a darker corruption route. If you don't like X route, don't play it.
Again: if that is the future of the game, it's ok. Good for you. Only not a game for me and some others anymore.