I remember when peeps were worried about how variations may lead to one character's worth of tools would be spread across three variations, leaving all three feeling rather underwhelming. While I feel like they've successfully avoided that for most of the cast, I think that Kitana is one of the few characters that ended up embodying that in reality.
Assassin's Sharpen buffs fan attacks to the damage that they
should do anyway.
Royal Storm gives her air control and anti-zoning that she previously had all of the time.
Mournful gives her safe pressure and blockstrings that she, likewise, previously had all the time.
It's also a little bit amusing how Mournful was
immediately written off by almost everyone when her variations were first revealed, only for almost all of those same folks to now be saying that Mournful is easily the best of the bunch.