Wait for Better Deals
If you want to save a little bit of money you should wait for more/better Battlefield 1 Premium Pass deals to arrive.
There aren't many deals on the Battlefield 1 Premium Pass. EA is offering a 10% discount on the $50 pass but that deal requires a subscription to EA/Origin Access. Amazon has occasionally taken 20% off.
As we push into the year we might see some retailers offer some temporary ways to save on Battlefield 1's Premium Pass. We probably won't see any massive price cuts but we could see the price of the game's season pass drop by $5-10.
Again, each expansion will cost $15 individually so the Premium Pass is actually a $10 deal. But if that's not enough for you, you should wait for a price drop.