First let me comment on the neck. This is the last of the standard rosewood fretboards. From now on only by custom order at extra cost. When I ordered this bass I couldn't know how fortuitous an event it would be. This slab of rosewood is deep; dark, and dense. You can barely see the grain which is very straight. The pores in the wood are very uniform in size and evenly distributed. I don't know enough about rosewood to know if this is a very old slab, but I suspect that it is. Showed it to a friend and the first thing he said was "Man! That's a nice neck. That's an old piece of rosewood right there." The white maple of the neck itself is also very plain with wide straight grain. No Knots. Seems very strong.
Three things are upgrades on the American Professional neck from the American Standard. First, the new fluted shaft tuners vs straight. I never had a problem with straight, but I can see where the fluted shafts are helpful to get a uniform downward wrap. Second, bone vs synthetic nuts. I compared the bone with the synthetic on my American Standard Jazz. Sonically I could tell no difference. Bone is simply perceived as higher quality. Third is the new 'tall narrow frets' vs medium jumbos. I've played medium jumbos all my Fender life since 1972. I do like the new frets as they seem more precise in intonation when you fret a note. I don't chord much, but they do help in that endeavor. My slap technique is laughable at best and I sounded just as bad with tall frets as with jumbos.
The neck shape itself is a throwback to the 1963 Precision and is called a "thick C" with an 1 5/8th inch width at the nut. I love it. It really feels good in my hand. I like it much much better than the 'Modern C' and 1 1/2" width at the nut of my Jazz. It just feels better; more comfortable, and plays just as fast as the Jazz.