I like robsons game a little more but always when a see a tall, hard hitting woman with limited movement I see firls like hantuchova, ivanovic and to some extend sharapova (when she is not on), i.e tons of UEs.
Often those girls dominate for some time but then opponents figure out how to neutralize that big FH and make them run.
that is not always the case (see davenport) but to be consistenly successfull (not only some fluke tournaments when their big hitting is on fire) she needs to improve her movement. not an easy task if you are 6 and taller as a woman.
but I do think she can do some damage maybe even win a slam.