Visual Lisp, to me, has always been a GUI for writing LISP.
I had Visual Lisp before it was a part of AutoCAD because I liked the way it formatted the code. Makes it a lot easier to read.
I actually decided to check out the Visual Lisp tutorial the other day just for the heck of it. So far, I don't see any benefit to learning Visual Lisp when what I want to accomplish is just as easy for me in LISP.
In fact, since I've been using LISP for such a long time it's usually harder for me to do something in Visual Lisp because it clashes with what I already know. Maybe not clashes, per se, but it's like learning spanish when you already know english so you can go to the spanish market and buy groceries. Even though the people in the spanish market all speak english. It hardly seems worth the trouble.
That's just my opinion, of course, and it's subject to change without notice.