As others have said, at least 4-6 more tracks. Cars, both road and race, from the last 6-8 years. I want the C8 Z08, G82, 992, 981 S or GTS, 982, AMG One, about a dozen of the old GT300 and GT500 cars, current GT300/500 cars, old and current DTM cars. A racing series to go with both Super GT and DTM. New LMP's. More categories for race cars instead of cramming cars that don't belong together in order to only have 4 classes. We need at least 2-3 more, preferably IRL licensed classes both old and new like GT3/GT4/Super GT/DTM/LMP1/LMP2/LMGTP/Group C...
Also, I want PP calculation to be done correctly. It's always going to be a problem with transmission, LSD, and ballast being part of the calculation so just remove them from the calculation so we can get back to having tuner races for Sport.
Most of all: about 200% more CONTENT! We have IB/IA/S licenses, so I want dozens of races/championships in each one of those categories.
What it NEEDS to be is GT4/5 with modern cars and modern graphics/physics engine. What it never needed to be (but is at current) is GT Sport 1.5.