Thank you for reporting the flipped arm menu. Will try to fix it in the next update.
Regarding player models. At some point I think yes but at the moment it is not on the immediate todo list as I think there are more urgent things do include in the game. But feel free to disagree :-). If you are interested you could also join our discord server here: https://discord.gg/7hvHAad there are already some interesting dicussions ongoing what could or should be included next.