I'll rate them from 1-10 from what I've seen. Anything below 5 or 6 should definitely be touched up I think:
East Bay Raceway Park - 9 (Could use a little wider groove for easier passing)
Lawrenceburg Speedway (In Progress) - 9 (Will be a nice track)
Lucas Oil Speedway - 9 (Good track, overused maybe)
Knoxville Raceway - 9 (2k11 is a great track)
Brownstown Speedway - 8 (Underrated but bottom lane needs to not be so flat, I have worked on a new version of this that could be used)
Volunteer Speedway - 8 (Good track, could use a higher lane, I have worked on a new version of this with the inside pulled in more for more racing room)
LaSalle Speedway - 7 (Could used touched up with new radiuses and I think different dirt color, but not bad)
Batesville Motor Speedway - 7 (The new one is alright, but I think Diz put the wrong version of the track on here cause it feels weird and lap times are like 15 seconds)
Utica Rome Speedway - 7 (Good track, fast)
Florence Speedway - 7 (Fun track but could be touched up)
Cherokee Speedway - 7 (Could be touched up, but no issues)
Hagerstown Speedway - 6 (The Terre version of this would probably be better than the dtr1 version but could be fixed up)
Tazewell Speedway - 6 (Bumpy but fun track)
Portsmouth Raceway Park - 6 (Not bad but could be redesigned to look more realistic)
Muskingum County Speedway - 6 (Seemed like a good track and fairly realistic)
Lonestar Speedway - 5 (DTR1 track I think, people like it but could be touched up for sure. IDK how close it looks to the real one)
Dixie Speedway - 5 (Not very realistic, runs fine)
Rome Speedway - 5 (bumpy but fun track, needs issues fixed including black flag)
Virginia Motor Speedway - 4 (I started a new version of this from Terre. The old version I think is not very good)
Hartford Motor Speedway - 4 (Weird transitions into the corners but track is pretty realistic)
Wythe Raceway - 4 (Think this track is messed up maybe. I also started a new one of it)
I-80 Speedway - 2 (Horrible and inaccurate. Would need redone from scratch)
Roaring Knob Motorsports Complex - ?????
Fonda Speedway - ?????
I-77 Raceway Park - ?????
I don't mind racing the bad tracks at all because just like in real life on the series tour you'll run into some one laners and then some fast racy tracks so it's a good mix, but now it's so easy to touch them up that it wouldn't be a big issue