There’s nothing much wrong with a BBOT bridge, other than bring subjectively ugly
I seriously doubt it makes much, if indeed any difference and I bet a good setup is more important to tonal quality anyway
Snake oil - tried it
maybe there’s a difference at stadium volumes but real world ? No, imho
you may get some functional things like threaded barrels for string spacing or somesuch
Just get a straight edge or fret rocker. I spent £11 on a fret dressing kit and solved my own problem that was similar to yours
a truss rod tweak plus two high frets
My fret care kit arrived from China and I sanded and crowned the upper frets of the stingray clone. It’s down to 1.75mm at the 12th … probably a good point to stop
when I’m feeling brave I’ll take on the p bass and it’s ski jump