The only select figures I didn't have a hand in were Elektra and 1940's Captain America and possibly one other that my mind can't grasp currently.
I'm proud to say that 95% of the time my concepts are chosen directly for bases and poses for select figures. In fact, the White Queen select figure, her year inducted into the Hellfire Club happens to be the year of my birth. We get to do fun things like that all the time here
I'm sure you won't be seeing anything for Spider-woman for at least a couple of months. And if I could, I would have loved to have posted my concepts for her. I can only say that when I design for a character, I try to learn as much about their history as I can, and that helps guide what direction I take an accessory. You obviously want it to tie into the character as much as possible, if the cost of producing the figure allows it.
As for Jessica Drew making it as a ML, anything is possible