Got it!
I don't think there's anything wrong with shaping a neck to suit one's preference, since it's not such an integral part of the instrument; same for adding graphite or whatever. My only concern, really, is with the addition of graphite increasing the odds of major damage to the top block etc. when (not if) the bass sustains trauma... Even if it's more likely that the neck breaks at the top, well, again, it's still just a neck.