Literally the only thing she lacks is mix up options...
All the top tier characters have great mix up options, which is why Kitana is not top 8.
I forget where I heard the comment, but Ninja Killa was essentially saying that if your character only relies on strike/throw mix ups, your character cannot be top tier.
As far as zoning is concerned, Kitana's zoning is average aside from d,b+3. Aerial fan toss is crap, and the EX fan toss was much better zoning tool in Mortal Kombat 11.
Zoning is weak in Mortal Kombat 1 anyway.
In recent times, the closest Kitana came to a top 8 character was pre-custom moves and pre-razors nerfs in Mortal Kombat 11.
NRS should add razors in this game. LOL.
I doubt that she is higher than mid tier.