Ataraxia2320
SS.org Regular
I guess I can only speak for myself but none of those things have even remotely been an issue for me on any bass I've owned. Basses, in general, don't really have the same types of tuning issues that you sometimes get on guitar... for many reasons. The pitch warble (which a lot of people specifically want) solution is really the only point that makes sense in the context of bass IMO. I might be missing something with all of this though, I've always used appropriate string gauges for really low tunings.
On bass I'd be more interesting in hearing how the mass of the bridge affects the sustain and low mid response of the instrument. I also wonder if it would have an affect on dead spots. The way those things are affected have the potential to appeal to a lot of bassists outside of the low tuning crowd.
For recording this is HUGE. The low end being slightly off can kill the punch and clarity of the bass and the mix.
Even a good player can pick or finger too hard or too soft on certain notes which causes the tuning to shift flat or sharp. A lot of producers melodyne the bass it is, this will theoretically allow them to skip that step.