The new scenes show up, it is just that for the final one, I don't have all the art assets, so only writing is there. This will be rectified in the future.
I won't be writing any extra kissing scenes for the game, though I understand your point. But kissing will be special for the Lover Slut Route, so it is best not to have it done normally as it would lose its weight then in the special scene. I am writing on the finale right now too, so I would rather avoid giving myself lots of extra work with new scenes as well.