I dont see Sakura learning/having learned this. If can compare them to The Sannin, Sakura would have to be the weakest of the three. If a time skip occurs perhaps I could see it if Itachi fails to stop Kabuto's Edo Tensei and continues the war.
I would hope her role get expanded into something more reasonable.... like in the kitchen, or perhaps as Naruto's secretary.
But seriously, if Kashi gives her Slut/Slug sage mode just to make her at least somewhat on par in terms of power and relevance... I would hope he could come up with something better and not take the easy way out