possibly add bandos boss,
it owns in pk servers because the drops are rare and when you do get a good drop you own for a bit till somone owns you..lol
idea 2:More shops with rune defender and some other cool stuff in.
idea 3:maybe you could add sounds into the game like whip sounds O.o
ill add more ideas when i idea them up rofl
a radio on the chatbox,(i will help if 2k cant add one )