Digitlman,
Your rear tires have the wear of someone who occasionally roast’s them off
Factory alignment in the middle of specs would yield normal wear (driving conservative)
Unsure how you drive, but if it includes burnouts on occasion’s, then have your rear camber adjusted to the least amount of wheel lean on chart....like just over -1.0*
Also, as they adjust your camber more positive (pulling wheels more upright), your toe will go more positive (wheels will turn inwards), so you may have to purchase some aftermarket suspension parts to dial into your driving style
More weight in rear or hard launches will cause rear tire to camber(lean) inwards more.