I agree with the idea of seeing BIAB as an instrument that you must to know if you want to use it properly. I've spend (and enjoyed) many hours hearing styles and demos, just for knowing "where is the right track in case of necessity". On the other hand, not everybody has so much time (or just the will) for this kind of things, the high number of styles and tracks make knowing all of them virtually impossible, and is true (at least in my experience) that the process of choosing the right style can be, on some situations, a long and frustrating task. It wouldn't be the first time that I, kind of irritated, stop working with the program while searching the right style / track just because, altough I know that it's out there, I just can't find it.
IMHO the stylepicker windows need a proper "search" function (a standard feature of any Windows program that shouldn't be so difficult to implement), a flexible way of organizing the tracks at your own way (wich implies drag & drop support, another standard Windows feature) and, maybe, a more descriptive and intuitive way of describing the styles & tracks. Asking for this kind of things is in no way complaining about the program (I really love BIAB, a truly unique program that produces, whitout a question, the best sounding accompaniment tracks in the world), is just asking for somewaht that some of us perceive as something that would improve the program's quality and the user's enjoyment still one step beyond.