[contego]

In my opinion those are all equally excellent areas to focus on, but I'd personally focus on releasing whichever is the quickiest solution you've offered.
I still highly recommend releasing some kind of active economy item with sign on bonuses/incentives. (i.e. hat economy)

Throughout this process Classic's staff, along with player votes, can help sway your decision on Classic's economy item. Although the economy item should remain on the back burner until your above suggestions have been implimented.