TrafficControlSystem (not the beta) in the pack is a good compromise for me : there are still lots of taxis (not so much with ~20/100 traffic density) but there is a good variety for the rest cars.
Low textures appears from time to time now but it's not very annoying.
One question : is there a way to prevent some certain vehicles from appearing in the traffic ? (now I have some Laudromat Burritos, Mule, Boxville, etc. which are not replaced with high quality models)