Dirty
dusty I will agree with. Oily, yep. Color bleeding, You bet! IMHO most darker woods are all of these things but I don't consider them dirty 
. It is just part of the craft avoiding oil and dust transfer. Rosewoods are oilier than most woods and color transfer due to dust and oils is a more prominent issue. Ebonies are less of a problem but their density dulls tools quick. I guess what I am saying is to gain the sonic and esthetic attributes that rosewoods offer we must deal with the sometimes aggravating attributes that rosewoods bring to the table. However Rosewood is no dirtier than maple. It is just darker and you see the dust easier. Oils, now that is an attribute that rosewoods can be knocked for if you are into placing knocks on woods for their dificult attibutes. I may self just look at these attributes as things to deal with and deal with them. If I looked at it diffently I would only build with spruce, maple and mahogany. Wait! i would have to throw out mahogany because of the pore filling, maple for the ease in being stained and spruce due to its softness and ease in denting. 