Why not drastically reduce the cost (in relics, etc...) of EVERYTHING -- (and I do mean drastically - like maybe down to 1/4 of the current costs) - and double or even triple current raid drops.
I'm a returning player - and every day I log in I end up going back to my main because the thought of starting the end game grind all over with a fresh 80 is too daunting. Without new players - the game is going to continue circling the drain -- and by making it drastically easier to obtain endgame gear you'd attract or at least hold on to new players. It would also make it much more appealing to existing players who are tired of playing their main and want to gear out multiple alts - but don't have the time or desire to do it in any reasonable amount of time (like myself). This would require practically no resources or effort from FC to do.
At this point - I don't know how much outcry there would be from the existing player base who went through the current endgame grind -- surely every one would prefer a healthier play base.