I'm personally hoping that they will have added more content for Halsin and reworked his romance -- but I'm not holding my breath. I'm hopeful that they are calling this a "hefty" patch because they're gifting us with more content (not because I feel it's needed, but because I'm obsessed with the game and it's made me greedy for more) and that it's not only bug fixes (which are absolutely needed) and new kissing animations.
