I think you should add some new skills to the game, it opens up alot to do, more market items and also alot more of activity to do in the game expect just to pk or to boss. Also max cape would be even harder to get which makes it a more worthy cape then just these 8 skills you have to do now. Also remove the skillcapes from the store so you see who has gotten the cape and are worthy to wear it instead of all having the opperunity to have every skillcape they want to equip. I also think you should add the little checkmark osrs have at the duel arena if you choose your preset duel settings.
Super
Lambfish