Most of your postings, if not all, indicate your disappointment with the game even before you got it, and yet you still went out, and bought it.
I have 18WoS too, and it gets boring rather quickly. Pick up here, drop off there. That's it. The graphics are by far more superior in R'n'R than any other trucking game, right down to the grooves in the road, to the shine of the truck, as well as the cabin views, grass, trees, and buildings.
I'll grant you that 18WoS has better truck physics, traffic lights, and stop signs, but R'n'R has events that could happen in real life to break up the usual go here, and there routine of 18WoS. R'n'R also has a decent story line that gives the game a little extra if you care to complete it.
You said questionable control. I have a G25 controller, and it works just as good as in 18WoS after some tweaks that took about a half an hour to do. As for sound, this only applies to the truck itself. Otherwise conversations, music, and other sounds are of good quality. Thanks to our modders, the truck mod sounds in the Modding section here alleviated this problem too.
Game playability. Not sure what you mean by this, but I've played this three times, and I'm on my fourth, and it changes from game to game depending on which route you take.
It has minor glitches, and design flaws, but no more than any other game if you have a high-end computer capable of handling it. The little ones I can barely remember, because of the over-all enjoyment I have with it, and I'm sure I'm not alone here. Lot's of people have given this game a poor review at the start, but then some of them gave it a chance, and they changed their viewpoint by discovering what this game has to offer. You can hardly be objective enough by playing it less than a day, or two. Most people just look for the bad to pick apart this game, and never give it any good points, and this game has many of them. 18WoS & ETS is not even close.