Crystal is barely there to begin with, Roxxy doesn't have 2 different art styles jumbled together that clash between older scenes and newer 1s.
Ok, so the preg update is not the reason then. Your remaining point is that DC can make 1 Debbie scene, but not 2 Debbie scenes, couse her art is irregular. Doesn't seem to have any sense at all.
Roxxy doesnt have two different art style and yet she is not in the pol.
Add to that, that some characters are not in that poll without any aparent reason at all, like Tina, Consuela or Odette.
Some popular character are there but others not. Some winners of the first poll are there but others not.
So... any other idea you can come up with?