GMG is offering refund if the game is still not running smoothly for you after the first patch's release. More details here.
GMG has suspended sales but was $24 after coupon: DEALZO-N40OFF-BATAKV
Honestly if you're going to buy the Season Pass, we recommend just getting the Premium Edition for better bang for your buck ($54 vs $60 separately).
You'll need to check out with Visa Checkout for the coupon to work.