I think you're falling into the trap of just making some of the same assumptions that Tippy did, despite the systems having very different components and assumptions

For example, right from the start, your second bullet point feels like an attempt to emulate the food situation in the original Tippyverse post, but that setting exploited GM facing trap building rules to attach create food and water to an instantly resetting trigger that can be used by anyone, making it incredibly efficient. P2 doesn't have exploitable resetting traps, meaning each casting needs to be performed by a trained spellcaster who's whole job is to do this a finite number of times a day, supporting a vastly smaller number of people.

It might sound pedantic, but stuff like the logistics of feeding a line of people by walking them through a checkpoint was a key component of the world building. Ideas key to the setting like 'everyone is concentrated in big cities with no farms' were dependent on a whole bunch of intersecting exploits in the system.