Overrated? I don't think so.
She's not hyped or something, but her results are OK, really. There are only few girls amongst her peers who have had better results and some of those girls (Stephens, Robson, Mladenovic) are in much better position, because they get more support, money, WCs etc. Aleksandra is doing really fine IMO. She doesn't have a big serve or some big weapon that would help her improve the ranking very fast, but she gets better every year.