Unfortunately, any game eventually looses the casual players, that doesn't mean that you don't get new players, only that the player stream slows; this isn't necessarily the end of the game though.
The only way to keep new players coming in & existing players active is by keeping the game fun & adding new content.
To keep the game "fun" we definitely need a skill matching function, this should ensure that you're playing against other people that you actually have a chance of beating. Otherwise, the new players will be totally outclassed & they won't hang around for long, no one likes loosing all the time.
It usually helps when a game has a level editor & judging from Frogboys comments we should be getting this feature soon. This will help keep current players happy & interested; it will also make the game "grow".
I know that some developers host completions for maps etc. & this would definitely help build a sense of community & also boost the quality & quantity of new levels. Apparently, all custom levels will be hosted by Stardock & hopefully vetted for quality & playability at the same time.
So in short: If we as a community are allowed & encouraged to participate. DG will have a long & bright future.
