I don't think they dropped the ball on this. For the Price, the URunner is an awesome value.
Yes, the speakers are weak, and the rear seat passengers can't here anything because the most rear speakers are the ones that are on the rear doors cards located very low. I will upgrade at the end of the 3 years of warranty, since I could care less about the rear passengers, and my dog hears plenty from all the way back from the trunk...
The head unit is 50x4, so when I do make the mods, I will hook the rear door card speakers and the small ones in front to the head unit, and upgrade all 6 speakers and get an amp for the door speakers and add tweeters probably. I am not huge on base. I just want clear, even sound..