In my opinion the F1 (and FGT) and ridiculous Redbull 'thing' shouldn't be in the game, why - because there's other games that cater for F1 cars and historically GT/Gran Turismo (in real life) usually is associated with road cars or race cars, other than open wheeled singled seaters.
Also, despite being a huge aircooled VW fan, I also think the schwimmy(wagon) and Kubel were also a bit ridiculous, maybe one of them, but not both. The Samba bus has a novelty value and the Ghia looks stunning in real life when modified, but in a racing game, we don't need them all.
Same applies to the large amounts of the same model, but with very slightly different specifications i.e. MX5s/Miatas, RX7s, Skylines, even cars like the Lotus Esprit (which I'm a huge fan of), why have a SE and a GT model of this in the used when the 350 is so much better and there's another (premium)Esprit in the new dealership.
I just think Polyphony need to reduce the car list by 10-20% with regard to cars being very similiar (as mentioned above), and then the time, money and resource they save by doing this be applied to other area's of the game that so desperately need attention / updating i.e. Aspec, course creator, online connectivity, livery editor, race modifications, more premiums, engine swaps(PLEASE PLEASE PLEASE PLEASE) etc etc.
Or, use the time, money and esource they save to try and include a greater variety of models and manufacturers. Alot of the cars in the 'wishlist' threads for gran turismo, on this site, are excellent choices and would really make the game a whole lot better.
I've seen the car list for Forza, and in my opinion there's at least 5-10 cars on that list, which aren't in GT, that make me dribble.
Alot of the slowest do have a novelty value (Panda, 2CV etc etc), and I do believe some, or alot of these should be included, but when so many big name / classic / cult cars are not included it does make GT look a bit silly.
I can't drive an old skool M3, Golf Rallye / Mk2 GTi, Cossie, Ferrari 355 / 288gto, classic touring / race / F1 cars, but there's plenty of 'copy' cars and mickey mouse novelty cars to drive round a track, at a er...um...tyre melting 35mph.
Polyphony need a wake up call, big time, they've lost the plot.