Well, assuming that just like in the first season, the season pass 2 will offer a better deal than buying the content separately, it’s not technically completely unpaid because in the end you’ve saved some money.
I mean, Season Pass 1 was 40€ and each of the DLCs was 15€, meaning that you ended up saving 20€ by buying the pass compared to buying the content packs separately.
If the Designer’s and Director’s Cut are both 15€ again, my guess is the season pass is gonna be 25€, thus not saving you quite as much but otherwise it might be too cheap to be worth it for GBX which is presumably why they’ve also thrown in some skins to sweeten the deal.