Did you see that match at least? She made some wonderful shots and great rallies (especially during the second set), some things a player ranked #286 wouldn't be able to produce so many times. It just shows she hasn't lost what used to be her strenghts.
In 2011 she was also playing quite good and went back to the top 150 (or nearly) after some years of disappointment, reaching the final of a 75k and winning a couple of other ITF's... I'm not even a big fan of her but still, you can't deny she has the game to be top 100 again. And if she has been top 40 already, of course she has the potential to make a return at least among the 100 best players