How feasible is it, specifically within FE8 at least, to increase each unit’s inventory size to at least 7 instead of 5? How does the code exactly handle inventories for each unit?
You’d need to, at minimum, allocate an extra four bytes (item ID + current durability) for every possible unit on the map. I don’t know how this messes with data alignment (my gut says it doesn’t, but who knows). You’d also have to adjust the display routines to show the extra items, as well as the AI to take the extra items into account.
It’s possible, but it’d be a pretty huge undertaking.
I’d imagine the save data allocation might be a bit tricky as well?