Please note this are just ideas! :
Stores!
Fashion Store <-- Chilling out time
Rare Store <-- Idk but you could think of something :p
General Store - Empty so people can sell and earn money
Drops
Clue Scrolls
Weapons
Armour
Runes
Coints
Minigame
I Like
Barrows
Gwd
These are my 2 Fave
But other mini games..
Skills
Woodcutting!
Slayer <- Make a slayer Tower! With the NPC's
Mining
Fishing
Or in other words, More ways of making Money!
Improvements that could be made
More Monsters
Areas
Making the Atking speed a little faster :p
Lowering Boss Hp
Making Emotes work (Skill cape)
Auto cast for magers making it work..
THIS WILL CONTINUE IVE JUST LOST MY THOUGHTS ATM LOL