all 3 allied factions can build caches.
the only time it can be annoying is if you have brit emplacements. otherwise its easy to prevent it. even if a team mate doesnt want to build a cache there is noting stopping you from doing so.
And? Caches are not hard to destroy at all, especially that late in the game. And if I'm nowhere near the cutoff and have to rely on my teammate to defend it then we have a problem...
It's a dumb ability period. So are all the loiter abilities, the computer is doing too much work for you. I really don't care that it requires the cutoff mechanic, the reward is 10X stronger than the work you do to pull it off. That's the problem
It's a stupid gimmick they made to sell a commander. The ability doesn't even make sense, but duration off-maps in general shouldnt be that strong. The fact that people's suggestion is "just retreat your entire army" should be massive red flag about how dumb this ability is