Same here.
The only thing keeping me from purchasing the season pass is the difficulty/star requirement.
If the free DLC are anything to go buy. I wouldn't have much fun with the season pass. I can do good enough to get the bare minimum to advance. But I struggle with drifting, gold is an afterthought. I only go for silver. I constantly fall a few stars short of unlocking the final event. I can get about 21-24 of the required, 27? but that's about it.
I wouldn't mind a slight tweak in difficulty.
The two new packs, Apex and Sakura require 8 stars to open the second section and 22 I think (might be 24) to unlock the last championship.