@EricLA , that was an interesting comparison, by referencing Tillis and Griner.  I believe a better player comparison at the top end of the spectrum is Elena Delle Donne, if you are using Iciss Tillis on the low end of the spectrum.  I wanted to respond to both your post and 
@dtbtbtb 's post together.
Having seen both players countless times in college, here is my assessment of Iciss Tillis vs. Azura Stevens:
-- In terms of north/south speed and leaping ability, Tillis was superior.
-- Tillis was a slightly better three-point shooter (using Stevens' three-point shooting at Duke as the barometer, instead of the one year at UConn).
-- Tillis was not especially adept at getting her own shot. 
-- Stevens, by contrast, is much better at creating her own shot.  Her pull-up and mid-range jumpers are excellent.
-- Stevens is better in attacking the boards at angles.
-- Stevens is a better rebounder and shotblocker.
-- Stevens is mentally tougher and more aggressive than Tillis, which was obvious from the first minute Azura walked onto the floor.
-- Iciss Tillis was a ridiculous athlete who happened to play basketball.
-- Azura Stevens is a basketball player who happens to be a very good athlete.  Stevens would be a basketball player at any height.
Basically, it boils down to these key points, in my assessment:
Azura Stevens is a natural guard.  She grew up being a guard, playing the position.  She then had a massive growth sport.
Stevens' game is built for the modern pro game.  If a WNBA franchise is drafting Azura Stevens to make her into a center, that would be, to be blunt, idiotic, unless you are running a five-out motion, like Phoenix did in 2007.
In essence, Stevens is not Tillis (she is significantly better than Tillis), nor is she Griner (Stevens is not a center).  She is going to be a better Tangela Smith, in that Stevens is more physical, has a handle, can attack the rim, but also can face-up.  Tangela Smith made one All Star team and was a career 11.0 ppg scorer over her 15 WNBA seasons.  I see Stevens as the next evolution of Smith, someone who can make a few All Star teams, but will not likely be a first or second All-WNBA team performer.  In other words, she will be a great WNBA player, but not an outstanding one.