I’ve never had a bass with a reverse P pickup but to me it makes so much sense, tighter more focused sound on the thicker bassier strings, more lows on the thinner twangier strings.
Interestingly we did a blind Precision bass shootout a few years back at the Herts Bass Bash, with the overall and runaway winner being a Mark Hoppus Sig Precision with reverse P pickup. It was up against some seriously expensive instruments but with a room full of bassists voting with their ears only it trounced the others.