I agree that neck wood seems to make a bigger difference than body wood...........by the way, I do NOT have a a degree in anything.
I have a Warmoth koa body Jazz Bass and it used to have a maple neck with Brazilian rosewood fretboad and it sounded pretty much the way a Jazz Bass is supposed to. Then, a TalkBass person had a Warmoth 100% all Indian rosewood neck and fretboard for sale and I bought it and switched necks. Everything else on the bass stayed the same..........WOW!...............what a difference! Dud and thud but in a nice way. Tremendous difference between the 2 necks.
So, I think and have experienced that the wood of the neck has greater influence than what the body is.
I've owned over 40 different basses over the decades and basically, body woods, fretboard woods do not fall into any predictable sound or tone. And, I have never noticed any difference between rosewood fret boards and maple fretboards. I have found that ebony fretboards do seem a bit brighter.
A piece of wood will sound however it wants to.