It seems to me that the best way to release DLC (for any game) is to release a little, a lot, and price it cheaply. So one DLC may just give one new ship and maybe some new ship designs, maybe a new game mode. In another maybe one track. This way you can always maintain interest over a long period of time and keep the game fresh. However the WO DLC seems to be going the one-big-splurge route.