If you read the title of the thread, you'd know I'm going to suggest a few things to improve. Improve what you say? I'd personally like to improve the community and the playibility of the game itself.
First of all, with the game in matter, I'd like to see a chance for something specific to be added to your inventory when you kill someone. For example, if you went out and found Goretooth smashing into people and you managed to kill him, there'd be a chance for his head (or something along those lines, a collective item) to be put into your inventory. This would allow a bounty system to be implemented.
I.E: Tom hires Jack to go kill Jeff, Jack searches for Jeff and finds him. Jack kills Jeff and collects an item of proof that he killed Jeff. He could then put it up for sale and Tom could buy it from him.
Of course, the above could use some revising, but it's what I've got for now.
Regarding the forums, I'd personally like to see an Introduction/Goodbye thread. This would help the community greet and recognize new players, whilst giving people who quit a place to say goodbye.
If you read this, thanks.