Yes but now since epics are super uncommon from farming. Legends are super hard to make. Really if you alredy have mythics, end boss gives about the same fusion points as 1 epic still, the problem comes when you don't have a legendary or mythic to upgrade. So nerfing endboss only made legends and myths more rare. But people who alredy had them feel little effect. Especially people that alredy had mythic.
And making legends more uncommon in premium boxes has made making mythics with cash super costly.
I mean you do realize it takes 5 legendaries to transform a legendary into a level 1 mythic right?