The tyre tweak has changed the feel a lot of the cars, the V8 for example feels a lot different than before (but then I only had limited running in the car before the new build). The kerbs don't seem to be as violent before and the Slowstice doesn't tip over as easily now. However the tweak seems to have affected the car used for the DWC, a lot of complaints about wheel spin and sliding down the straights in the COT.
BTW - Endurance pit for Spa....YES, could have done with this for the Spa races healed over the past few weeks. A drive through the pits now takes close to a minute, will be great for future endurance events at Spa.