Consider the fact that there's no subscription fee, that the content upgrades (S1->S2->S3) are optional, that InSim is fully available in the demo, that there's no time-limit on the demo, that old versions of LFS are not actively locked out from the master-server, and so on.
Clearly The LFS Team is not in it for the money. Something else is their driving force, and I know for a fact that it's their dedication to making the best online racing simulation. This means they will not always give the community what it wants, when it wants it.
This is why I'm not the least worried about the lack of content updates (nor any other kind of updates for that matter). They'll become available when the time is right. Until then I'll spend my time partaking in some league racing, organising IRL-meets, visiting my girlfriend in Norway, having a drink with my friends and other quality stuff.
Devs, take your time!
Community, don't panic (written in large, friendly letters).