Mal,
I am sorry if I derailed your thread in a way. Topic seemed like an open question. I agree to some extent to what you are saying. But RT's are designed / recoded in such way, so they can be easily manipulated and surely because of that there are some limitations. However by using Partial Regeneration you can get pretty interesting and fulfilling results. A much better fit than initial random generation. Personally, I enjoy the diversity of genres and instrumentals PGM offers yearly.

I am certain there are tracks that you like in BIAB. Why not request similar, or offer concrete suggestion? For example, I would like very much to get more acoustic and electric Reggae, Ska and Surf rock RTs, which are represented very narrowly and are hard (except for drums) to fake with Midi. These have to be played. I am not sure if it happened specifically upon my requests or not, but a few tracks from the genres above were added past few years.