When you have a service writer at the Ford dealer I purchased my Ranger from, tells you that you cannot X the tires on it.... Sometimes I wonder about some folk's IQ.
Directional and staggered tire setups require different rotational setup. What's been said is fairly close. Where things get squirrelly is when all four corners have different sizes like in oval racing.
I usually switch them from side to side, gives me an excuse to clean them really good while off. Not sure if it does any good, but doesn't hurt that's for sure.
Square setups I have always had good wear back to front, fronts x'd to back. I'll burn the p zeros up before going to Michelin ps4s. Haven't looked to see if they're directional but I don't think so. Just trying to get the most out of em. Thanks All for the input. Eric