The whole "anal-island" thing did make me laugh.
As for the love option...because this is using Korra, I don't think you CAN do a love option. Korra herself is a generallly unpleasant person at this stage, and adding in her being a lesbian kinda limits what you can do. The character leans toward a BDSM storyline by nature, which her being 'broken' and forced to serve someone despite her supposed to be "the most powerful bender alive". It is Korra's need for humility that calls for it. And honestly? I don't think the game does enough in that area. It could and maybe should (at this point) go a bit darker and really break Korra into a full-blown slave.
...however...you MIGHT be able to do the same thing you did in the Fire Nation section, aka create a whole new character which has a new and unique storyline involving Korra. Maybe this character rescues a recently de-powered Korra, which has to go on a quest to regain her bending abilites, and has to learn to depend more on others for once. This can also explain learning to air-bend as the new character is a recent student in air-bending themselves and has to learn to teach. And thus keeps many of the assets you already have. Plus you can do a cool Oliver Twist-like story of being on the run from the cops, the terrorists and pretty much everyone else. You can even work in Asumi if you want tomake Korra fully bisexual, and give the love route some scenes to make it worth doing.
I personally think that despite some of the hiccups and oddly changing art, the game is a pretty decent one and look forward to it being completed. It is a LONG haul and had to have been a nightmare to make. If the dev is reading this, keep up the work, don't rush to please people, and take your time. Once it is done, it is done. We'll still be here.