I'm surprised that the new tech system comes in a free patch and not a DLC. After all, Paradox is pretty much the most Jew game developer.
The new technology system is a fundamental change to the game, if they made it DLC only they'd have to maintain two separate tech systems in all future patches.
I wish they'd be a bit more generous and make the new landless adventurer system and rebel system free, playable pagans and the 867 start date should be plenty of incentive for people to buy the DLC.
When Paradox announced the new CK2 DLC system they said that the DLCs would be self contained and you'd only need to buy the ones that interest you, and the Sword of Andhaira DLC lived up to that, but since then they've started throwing in small features that are unrelated to the DLC's theme and that significantly change gameplay for everyone.
Overall I'm happy though, the DLCs have greatly improved the game and keeps it fresh, and the cost is trivial for an employedfag like myself.