New save structure

No idea what you're trying to say here lol

Well yes and no. When you buy something from the shrine, it writes the perk to your save (which isn't timestamped) and also adds it to your inventory (timestamped). Inventory and save are two separate things, however the inventory is completely server sided and is very difficult to manipulate. However, that's not all. While this is the normal behaviour of the shrine, if you use something like Fiddler to manipulate it it writes the perk to your save but won't update your inventory, as there is server sided validation happening here. While this may sound ideal initially, you have to keep in mind that the devs can compare the teachables in your save (it's not hard to tell if you bought from shrine or unlocked it from bloodweb especially if you don't own the character) with your inventory. If you have teachables that came out after patch 2.0.0 in your save that don't exist in your inventory then that's a detection vector for the devs to use.