Alot of work went into Gallia and to be honest we couldn't have hoped for a better canvas to start an expansion on our already loved game. It's a numbers game. What the majority would consider 'fun' consists of a number of players. Anything larger than 3-4 in one place roleplaying or fighting. When the averages of the mod see an even spread of 1.3 players per system, of course we're going to see inactivity when something's going on somewhere else.
We will eventually become familiar with it's integration and people will start populating.