Jagex is currently working on RS gold EoC due out in order to (hopefully!) fix my dislike of grinding. EoC is perfect for me personally. I just would like EoC to be able to degrade swifts and goliaths. I'm sure everyone has an axe, right?
How do you fix this problem? A high-level game that grants you more XP however, it also instances is the best choice. It won't crash you to hell. I think it's a bit like Dungeoneering. The high-level content could provide food/pots or cash that cheap OSRS gold you could buy food or pots. They just need to make sure that it's not bottable, and I think it could be a success.