I believe the conspiracy theories about DE doing this for money to be a bit absurd and it's more likely that this was just a really bad call. DE makes most of their revenue on cosmetics, not gear. Never mind the fact that making new gear only to nerf it would be a very bad business model. That said I am disappointed that DE has yet to fix the age old issue of shield/overguard buffing frames harming people who get energy with Rage/Hunter Adrenaline. There's a simple solution to this, change how the mods work. IE, have mods that makes it impossible to get buffed with shields or overguard. Maybe even change the previously aforementioned mods to have this effect.
As for the debuffs, I don't know I think they should listen to players evidently because it's quite clear that the frame has become annoying to play as. They'll see an issue when the amount of people playing Dante goes down.