1. No plans for other partners at the moment, so you gotta deal with Roxy lol.
Nothing planned for Eve, she was meant to be a tragic character. With boobs.
2. Melee weapons will come eventually (there's leg module in the game that gives you a powerful kick
3. level limit is 99.
4. Yes, in fact Rocket Launcher is in the game already. I am not gonna tell you where it is lol.
5. My art is inconsistent anyway so her boob size/ass size difffers from every scene lol so, no plans on enlarging yourself .