I would like to suggest switching the track available for test drive in the store to Portimao instead of Raceroom Raceway. I think that test drive for each car in store was brilliant idea and it does its job very well (at least in my case - I wouldn't spend that much money for R3E as I already did, if I wasn't constantly teased by how great this or that car feels in test drive, and I just can't keep myself from testing another one in queue, and then resisting the "add to cart" button is really difficult . I think that this option would be even better and could drawn more people into buying content if test drive was available on Portimao, as it is real track and many people don't like fictional tracks that much, which may somewhat spoil the immersion during test drive on RRaceway for them. Portimao is also free track, so I suppose it shouldn't make big difference eventually.
We briefly touched with the team on this subject after reading your post, and we also agreed. I would expect it to be updated to Portimao in the future, not sure when though!