Consider how many Runescape players including myself, have left to play in other MMORPGs that have a similar action bar system. Of course I am RS gold talking about World of Warcraft. Now I'm not saying runescape should be more similar to WOW, not at all however, the majority of moos currently adhere to the EOC-style of HCI. Why does this happen?
It has been proven to work. This runescape, from both an economic and game perspective, would not survive without updating. Jagex, at its core is an enterprise. It has to pay its employees as well as pay taxes, and turn profits. Jagex OSRS buy gold could soon lose its advantage if they don't keep running the game at the standard.