Its very possible that i missed some, if you can tell me there i will fix them!
Yes guns were also planed to have a class with skills associated with them. Just not in the demo.
I have some rough ideas when it comes to tf's that could make it in the full game but i haven't made plans that are set in stone. I do would like to have one in the game with the opposite effect from shrinking but I cant make any promises if such a forms would end up in the game at the end.
I think it's a great game a should be brought back out in full release with a little more effort about the implementation as well bugs, spelling, & grammar errors. With time and patience, it will be an even better game so please don't give up hope. Also, you don't need to make everyone happy and go with their preferences. Because for one there is roughly 8 billion people in the world so it's relatively impossible to make them all happy. Just focus on toughs who are interested in this kind of stuff. Find the people who will stand up for you, as well as by you, add help however they can. Good luck & God bless your journey.
