You misunderstand Unster, I'm actually totally with you on this.
My point is that the map environment has potential for creating many interesting challenges BEYOND the basic 'Move 4 logs from A to B'. Many people in the past complained that the game was boring because they completed it in a couple of hours. They missed the point. Casual mode goal completion alone should not result in the end of the fun.
There could be a bunch of interesting developer created challenges that would make the player have to create new goal completion strategies. Yes, you can still look for the most efficient way, but something other than one delivery challenge per map and you're done (e.g. adding a 'crane operator' type challenge per map, adding a 'get to grannies house on only half a tank of fuel' mission, have a 'recover broken down vehicles first and use to complete' mission etc.). You could even have community leader boards for e.g. shortest time to complete, least amount of fuel, least distance travelled etc. That would give players who've completed the maps already to have new goals to reach for.
I suspect that given the right game engine design, creating new challenges post launch would be relatively easy and significantly less overhead than additional maps and vehicles. If Focus were to regularly release challenges (say a couple per month as part of their standard update and bug fix release strategy, people would be super happy because the game wouldn't get stale for those people who already completed. It's all about looking for ways to mix things up and increase gameplay longevity. Down the line (with the right tools) you could even consider having community created challenges that could be shared. It would be relatively easy to have a tool in game to allow you to place (or randomise) spawn points for the different in game assets.
@sodoma Any thoughts on this?