I know OOO used to read these but I am not sure if you will as Grey Havens.

I think you have to manipulate the gamer addiction and tweak some booty stuff:
-grinding levels were addictive with friends. old friends are leaving because there isn't really incentive to keep playing. they need to be rewarded. something like the companion boxes. a box could be rewarded daily for logging in- boxes should give out items/costumes/accessories that are bound
-the sk economy is not doing too well and needs some readjusting on the market.
-you need to start creating crown sinks again. Use the AH similar to the supply depot and put up rare accessories for time durations (no buyouts - the coral/violet chapeau durations were easy to figureout)
-make players use punch more (it can become an insane addiction).. Punch's Time to Shine Promo! Punch Mask, punch everything
-daily event like the companion boxes (if you log, you get a free box. everyone loves to feel rewarded - soon they start acting like dogs and log since their brain are accustomed to feeling good for logging in)
-more supply depot sales for short times but more frequent (this way players log on more to see what is being offered)... also you really need to think about the items for sale and the pricing more carefully to maximise sales.
-interact with the community more (ingame competition, trolling haven

Thanks,
Extrajuicybits/Pearl-Tea/Joosi/ etc etc

sorry didnt really read through everything but those are some of my thoughts to improve. might be complete garbage