I'd love to see the insanely high swing speed for weapons turned WAY the **** down depending on the time. Have most weapons slower, but with some kind of pro. Whether it be increased speed, life leech or whatever, I just think something to change the monotony of it all would be interesting. We also need some damn reapers. Melee and gun in one yo

Or you could always implement the energy system so that you can't swing at the speed of light constantly for the next millenia. Make many misc things use it and even some weapons. Instead of an ammo reserve they draw from your energy.

Make the flamethrower actually have some damn range and leave flames on the ground. Being hit by anything other than melee will set you on fire for a few seconds.

Goonadier is fine. It slows people down which is a huge perk. It can guard an area and deter invaders for a while.