I just started my studies in university of applied sciences, no time, but everything new is worth a try!
In my point of view, problem isn't people moving on and game getting old. I have noticed a lot of trouble on servers and community behavior.
SoD servers doesn't attract people anymore, it's also caused by how our members talk/treat the newbies. I tried to talk to people and tell what's wrong, but no one can see it the way those people do who are new.
I think, by adding a game it will still be the same. Like illness, u can't cure it fully without taking care of the thing causing it. U can see the symptom, u can cover it/treat it, but u have to find the reason to get rid of the actual burden.