The Radical SR8 now has wing drag and rear downforce closer to what is "correct" based on our limited data from Radical UK. Body downforce is higher and the drag induced by the rear wing is less of an issue at higher speeds. I think it still might need a slight tweak to get the balance better, but it's much improved as it stands now.
The Formula Mazda now has much more appropriate drag and downforce available in both front and rear wings. You shouldn't need to run 13° front and rear wing angle at all tracks, all the time. The total difference in top speed from running minimum wing to maximum wing is now 8 mph, which should give a much better opportunity to have widely varying setups without any one having the absolute upper hand. This change will be released in a separate update at the end of this week.
The car no longer slides slowly across the ground while stopped, and the auto brake when stopped operates better.
The engine can now be damaged by over revving, especially on early downshifts. There also may be very rare engine failures even without significant abuse, so don't feel too bad if your engine gives up (but try not to over rev). Keep an eye on the water and oil temps -- water shouldn't exceed about 220 F, oil shouldn't exceed 240-250 F, or you'll be starting to take chances. Those temps may start to climb if you are spending a lot of time in the draft.