No. There are some non-cup drivers that float around in the lineup to fill it out, but they're all current to my knowledge.
As for this patch, it's encouraging they're working on things... but based on what they've released as details, it's not good enough. The fact they haven't mentioned attempted improvements to the framerate, or more player customization options to driving model and difficulty options (traction control, stability, racing line, ABS etc) is disappointing.
I guess we have to wait and see what's included in "other fixes". I'm glad they're working on it post release though, because there is a long ways to go. Something is better than nothing though, so I'm thankful for that.