No, it is $20/€20 everywhere. And they promised us nothing more then this to start with, actually originally we were only going to get California, that Nevada is already in and later on Arizona is actually a bonus on top of what they promised? In march 2014 they already said there would be no unlicensed trucks from the start. The map is awesome and much more detailed then ETS.
Don't forget ETS started as a $35 game, with then very crappy AI and physics, and it took them 4 years to finally get the last license. ETS was unpolished at the start, ATS isn't? Don't forget ETS received 21 patches to make it what it is now...
What kind of problems are you having in the game BTW that it feels unpolishged to you?