Yeah. FFA changes the game rules somewhat with its bounty (killing units nets the killer 1 gold) and the owner vs lender rules you stated, but I feel that the "your units can't patrol during your turn" rule is less circumvented by FFA, and more just an edge case that doesn't need to be addressed. So the rule might technically be "Your units can't patrol in your own patrol zone during your turn", but it doesn't need to be stated that way because outside of FFA the issue will never come up. Much like how Rich Earth's actual function as dictated by rulings is "Your workers cost 1 less", but outside of the Map card Hard Times Mill (your workers cost 1 more) there is virtually no difference, so the rules is stated in a more accessible way rather than in a precise way that addresses all corner cases. Incidentally that also describes much of your problems with Codex nicely.