Katarina can't really dominate as many gold incomes as Yi can, because what made Taric/Yi work was Yi's ability to farm the jungle AND a lane, get a huge gold advantage, and use his mobility and ganking power to take over the game. Taric was mainly used because his kit makes him naturally useful even when behind, and the fact that his ult works super well with a fed Yi is just a bonus.
Katarina doesn't have as strong an ability to jungle, and can still be stunned out of Taric ultimate, so she's not really an issue with him.