Ghosting is usually a result of moisture either in the atmosphere, for example if you work in an unheated workshop in damp weather, or from the timber itself. The latter can be prevented by sealing with sanding sealer before applying the CA.
I don't find Shellawax or any other shellac based friction polish sufficiently durable which is why I use CA but that is just my opinion based on my own experience. As for whether CA has any advantages over acrylic lacquer, I don't think it is any better as a finish, I just find it easier and quicker to get a good finish with the CA.
If I could find a pen finish that was as durable and easy to apply as CA but did not have the disadvantage of noxious fumes I would use it without hesitation, but in 20 years of pen making I have yet to find one.
Just as an aside I use CA by itself without BLO as, in my opinion, the use of BLO adds nothing of any benefit to the finishing process but increases the intensity of the noxious fumes.
Walter