Mida definitely had/has uses in end-game - that is, until the stagger is taken out. Ever use it to stagger the swordbearer in bridge phase of Crota so the other teammates could drop him? I have. Ever use it to stagger swordbearer in final round of Crota so teammates could drop him? I have. Ever use it to stagger boomer knights in tower during final phase of Crota? I have. If I run Crota solo, that's my go-to gun. Pushing all of that aside, you are still side-stepping the real issue... it doesn't matter it's a minor nerf to PvE, it's a nerf that wasn't needed for PvE. Continuing your path illustrates your bias.