The problem with that logic is that with Viking wasn't a nerf but a retooling for awakening and he went from being a benchwarmer to getting some use in the game. Had they done something to combat the problem that invader was only useful in one aspect of the game by buffing other aspects while removing the power gained by that move there wouldn't be nearly as much backlash.
Again, the complaint is not that we lost an Eddie who can solo odin (considering odin is less worthwile than Baph) but that an Eddie who we spent literal days of grinding to get is now worthless.