There are many viable solutions to this issue but they all start with CG realizing that 5+ year old content should not be seen as a perpetual stream of income. There has to be a balance to the ingame economy to have the grind stay fun or at least tolerable. When adding new layers of grind requirements the older bottlenecks should be eased accordingly. And new content that lets you use the new layers of power should be added. Do not just increase difficulty on old content. Grind that lets players feel a sense of achievement is fun, grind that just make you feel like you have to “pay” for staying at the same spot you already were is bad design. Both models generates revenue but one is toxic to the clients.
