I waffled on this one for a while. Tiggs clearly has an amazing voice, but it's true that it's just not being used to its full potential. While her range is indeed impressive, it's not as impressive as this track demands. It swings from contralto to soprano and even then forces her to jump octaves to fit everything in. 2:35 is just egregious. If she can't stay in the same register throughout this section--small wonder, and no fault of hers--the part should be pitched down a couple of notes. Find her high note and write around it.
Otherwise, yeah, read everything proph wrote and take it to heart.
Production is phat AND fat, with some buttery-smooth synth brass & bass, and generally I think this instrumentation is rock solid & absolutely suits the source.
The arrangement is equally intuitive, and perhaps TOO intuitive - this is definitely a relatively conservative arrangement that leans on production enhancements more than gobs of original writing or harmonic alterations. What's here & additive is good, but there are also extended swaths that run parallel to the original, more or less. I would have liked to have seen a bit more addition and alteration in the arrangement department, but I concur with the above that it meets our standards in this regard, and from a pure joy/funk/production perspective, this is ace.