The new amour values in 1.12 seem slightly off.
Values compared to 1.11:
The stab vest is now ~33% better than the press vest due to it having 100 HP (up from 30) vs the press vest's 75HP (up from 50) and remains lighter. Given that the player can have a stab vest in the first 2 minutes of spawning in almost any town and the comparative rarity of the press vest, the press vest should be more effective protection than the stab vest and the HP buff the stab vest received was pretty extreme leaving it not far behind the plate carrier in ballistic protection.
The second issue I see is that the ballistic protection of the tactival vest has been completely removed. Previously it was an interesting item in that it offered good storage with very light armour (same as stab vest protection), something that no other vest did, now it is simply another storage-only vest without any protection or a unique purpose - not really worth a trip to Tisy for anymore. I created a separate ticket for that issue in case it wasn't intentional: https://feedback.bistudio.com/T157705