So throughout the story she will grow, just as the collector explained. However the way she will grow will be more interesting, at least from our perspective outside of the fourth wall.
Occasionally I will make a post with several concept designs for her next upgrade, whichever one wins will be turned into a full drawing while the others stay as sketches for me to look at when I'm bored.
In her final form she will have elements from all of the previous designs, with a few extra things added. This will be the only form (other than the current one) that will not be a vote