This event was fun for roughly one day, then it was just grind. Same missions every day, or stand in a group at the fleet and get infected, just to gather another currency. It got old realy realy fast. If you want to make future events egaging, beyond grinding, then make them progress, either through a quest arc for each player, or through changes in the area based on the achievement of objectives of all players in the area (like you had for PVP on Ilum).