Dude, Kitana is probably one of the more used chars in high lvl tourney play. Look at who represented her well at Dev: Osu, Mr Mil, Mafia...etc. Jade's had recent and interesting buffs, while Kitana was one of the least touched chars in the new patch, tho dash canceling affected her a bit.
Also, Idk maybe Jade has more less serious players playing. :shrugs: