Only way to get mechanical grip back involved is to decrease the corner speeds. The entire cup car is currently sealed to the track, and there isn't anything a tire can do to help it. If you give it a tire that will make the cars slide around, then we will have what we had at Kansas which was a joke. The amount of side force that is created now is off the charts. 10 years ago "side force" wasn't even in the dictionary when it came to talking about NASCAR, now it is everything.
The wicker should be gone, not lowered. The rear spoiler I don't care too much about. I don't want it tall, just to what it used to be. The front splitter can go hang itself. Instead of doing 180mph through the turns get it back down to 160. The loss of front downforce would have crews loosening up the car more to try and find a more neutral setup for the long run. The guys that are a little loose will be fast on a short run and then get undrivable throughout the run.
Anyone who watched NASCAR in the early to mid 2000s watched Matt Kenseth become the guy who qualified bad but had the best long run cars out there. If it was a 15 lap run you would count him out, but if the final stint of the race was 20+ laps then you couldn't ever rule him out. Now Matt switches to Gibbs, who to be honest are known for their qualifying and short run ability. And oh look, he racks up 7 wins this season by just putting himself out front (whether by qualifying or pit strategy) and just locks himself there thanks to the clean air and inability to overtake (unless your car is much stronger).
The decrease in corner speeds would also allow Goodyear to adjust the tire more, allowing wear and punishment to become a factor again. At the current rate of cornering speeds, Goodyear honestly have their hands tied behind their backs.
Just want to state I'm not hating on Kenseth. I've liked him ever since 1998 at Dover.