1950's Le Mans / Sports Racing Cars - at present we don't have any, but we could have if the following cars were added to the game. A 1950's World Sports Car Championship would be great.
Jaguar D Type
Maserati 300S
Ferrari 250 Testa Rossa
Mercedes Benz 300 SLR
Aston Martin DBR1
Lancia D24
1960's Le Mans / Sports Racing Cars - at present we have the Jaguar XJ13, Ford Mark 4, Chaparral 2D and Ferrari 330 P4, but we don't have the following which would enable a 1960's World Sports Car championship:
Ford GT40 Mark 2
Ferrari 250 LM
Lola-Aston Martin
The whole Historic / Classic Car racing genre needs looking at by PD - we had a 2 race championship in GT5 and again in GT6. Surely PD can do much better than that! The car list is building - apparently randomly so a clear direction with the car list to enable a huge improvement in classic racing categories.
I would like to see them add road cars used in the 1960's ETCC and BSCC which were also used in the early days of Trans Am in the under 2 litre category such as the Lotus Cortina Mark 1 (1964 BSCC and 1965 ETCC champ) and premiumize the Alfa Romeo GTA 1600 (1966 and 1970 Trans Am Champ)
Group 7 unlimited capacity Sports Cars as raced in Can Am, European Interserie and Japan - we have only the Toyota 7 and Chaparral 2J, but these were the fastest circuit racing cars on earth and there were many fabulous and beautiful cars from Toyota, Nissan, Mazda, McLaren, Lola, Shadow, Chaparral and Porsche.