*deep breath*
Other KS types are in the cards for E2, with different attacks. Maybe even other pedestrian types (the code is there for at least one alternate behaviour). Drones you'll be happy to know are also in. Pedestrians have pathing code implemented, I'm just not using it in E1. Animals will need whole new rigs, so might not turn out worth the work. Antennas probably won't happen (just pretend there's some future tech at play. :v) but you've probably already noticed the conditioners here and there. Plot development, well, can't spoil. Cellphone interface...sounds incredibly cool (Zineth, much?) but way beyond my abilities, like custom graffiti. 3-level graffiti will stay for balance reasons, but redoable graffiti I can look into. Unlockable tracks I can do. Localisation I've looked into, but you've guessed correctly about the font issues (the software I use for making in-game bitmap fonts only supports the base 26 Roman letters and punctuation). The logo I'm keeping because the symmetry is meant to bring to mind a butterfly's wings (plus I'm probably in too deep now to change). Anne and Nanashi I'm purposely keeping for E2. Extra skins I've floated, but decided against because of the work involved. Steam is a complete, total, utter and permanent no. Finally, I'm leaving the OST business in your hands alongside all the profit from it. You absolutely deserve that.
A bunch of these ideas are stuff that sounds cool as hell, but which I couldn't even hope to get done without a proper dev team. Which, well, fingers crossed for the money for that.