As denoted in the patch notes
Versus in game:
As you can see, his armor and mr growth is still 3 / 1.25 per level respectively, his health growth is even fucking lower than before (83 versus his prior of 95, supposed to gain 115) but the armor / mr nerfs still went through. So he is currently lacking 576 hp, 18 armor and 9 magic resist. Might wanna hotfix this chiefs.
This is HUGE and likely a big factor contributing to sylas feeling like shit. I'm actually stunned that the counterbalance to removing his shield could be forgotten.