If this is the case, why would Turbine spend money developing content for players who basically play the game for free? Even when the new content packs come out, my bet is players such as yourself have so many TPs earned from favor that you don't need to dip into the wallet for much real money for that either.
All that said, I wonder if the 5% figure for players who play epic content will increase b/c of the changes from the new update? More players playing epic might mean more resources devoted to that? Or perhaps there is something grander in the works that would make 'epic' content obsolete?
However from Fernando's recent letter, it sounds like devs will be focusing more on creating mini-game type content - like crystal cove - so players can log in for a 30 -60 mins and just play the mini games. I wouldn't think that bodes well for epics.
In the end, the market will dictate where the dev resources will go. Unless a much larger percentage of the paying population plays epics, then epics will probably continue to be a low priority.