I'm originally from Chattanooga TN and the traffic, in an out of the Bachman Tubes Tunnel which is the Tunnel through Missionary Ridge just to the east of the Interstate, was always a problem with no apparent solution. At some point in time, since I left that area, the city installed a round a bout solution which I have to say works amazingly well. I've also experienced Round a bouts when I lived in Atlanta and when visiting the Washington DC area. I, personally, don't have any problem with them and actually find they work quite well in highly congested areas but I will admit that it's not for everyone.
There is most definitely an intimidation factor if not fear factor for anyone that is totally foreign to them and there is a learning curve involved. Some people just can't seem to get the hang of them either. While I am a fan of round a bouts for certain traffic situations and the situation that 7-points presents is a logical candidate for such a solution I believe that the 7-points area is not a good candidate for it given the existing businesses and space available as it would take a total reworking of the area and would adversely affect several businesses that would not benefit from the drastic change but that's just my own opinion.