People will always find the most efficient way to gain SP/hr and lather, rinse, repeat. No one wants to spend more hours than necessary doing the grind, I guess some people do, but there's no accounting for taste. If 'the best way' is repeatedly nerfed until all methods are garbage then everyone will be eternally grinding and there will be no clamor for endgame because we'll never get there.

I couldn't agree more with Speeral and Avalonstormm.

The OP sounds more like a case of misapplication of game mechanics than something which is broken and needs repair.