Charlie, honestly I am not sure how to take your "responses" on this topic. Very (very!) recently you personally were discouraging me and few other users from even wishing more tracks in the mixer.

"the two StylePickers have existed side by side for years without issue"

Most likely because "some" people did not see issues with the design and workflow aesthetics at that time. Perhaps there should been proper filtering options and techniques ON DEMAND, not by default, introduced to main picker? Or even perhaps a few other opinions gathered on this matter outside the think tank.
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Noel,
I tried using filtered picker for few days now. It is LIMITING creative process by not having proper sorting and the way it displays things.
Menus, within menus, shorthanded results. Etc. I have another idea. How about asking all these people who requested and supported idea of more mixer tracks directly? Not great many to ask. If you wish, I will gladly locate their user names. I wanted to write to you directly, about gathering opinions of people who were supporting the wish of adding more mixer tracks, but unfortunately seems you blocked all private messages.