She'll definitely fall with time as people begin to learn that you have to play neutral against her and that you can't mash nair for ez wins like [top tier] can do against [the lower end of the cast]. Top players like Dabuz and Nairo are starting to use her less and less, more as a counterpick than a go-to unlike the first month of the game. Really though, I don't see her falling below high tier, unless they nerf her, whether it be directly or indirectly. She definitely can't be solo mained though, so it's better to have someone else to fall back on if you run into an iffy MU. I could see Fox being a good secondary for her, but I'm not too well versed in his MU spread.
You could play her until interest begins to wane or until you find someone you like better.