I don’t know if this is a bit of a stretch for this update, but maybe one week being themed around Vintage Trans-Am cars could work too?
Currently the Vintage Trans-Am division only has one car, which is only available as a reward car: 1970 Ford #15 Mustang Boss 302 Trans Am
Unlike the modern Trans-Am cars or the ones that are currently placed under GTX sportscars, the Mustang does resemble a touring car a bit (but not fully).
So maybe it could work as one of the weekly themes? It could be a good way to introduce more cars to this division!
Be sure to vote on these cars with TA-racing (and look for the older cars).