To answer most of the questions regarding this issue, I have no fired the P365. I just got it two weeks ago and still have yet to put a round through it.
As for the slide, I don't see any wear, however, I don't know what "wear" I should be looking for on the slide. I oiled the slide recently and seems to clean fine, maybe the oil residue after I've wiped it clean tends to appear hours later?
As for another back up to my carry weapon, I do carry a Ruger LCR .38 +P. I do like revolvers and the only non revolver firearm I would dare carry is the P365 because of it's overall footprint and capacity. A little heavier than my LCR, but having all that many rounds and even an extra mag, makes this a better peace of mind carry.
I've called SIG this morning, sent them photos, got approved, and most likely sending JUST the barrel back. I wish there was an aftermarket SAS ported barrel I can get. I wouldn't mind picking up a TRUE Precision barrel for my SAS, I just don't see the justification for having the ported slide then.
So excited to carry the P365 SAS but this happened, now I have to wait...SMH