According to the official Driveclub twitter, the PS+ version of Driveclub is still having trouble with their own servers. It doesn't look to be coming anytime soon.
Driveclub was initially set to get a PS+ release with the retail version of the game. The PS+ version is several months late and has been delayed until further notice
According to the same twitter, we can also expect more content to come.
Let us know what you think of this and stay tuned for more news on Driveclub