The people that wanted higher difficulty are not playing on the lower difficulties. They'll be aiming for the higher difficulty tiers, and so any changes made to cater to them should be localised to the gamemodes they favour. The changes, as they are, have made the lower difficulty levels tedious and frustrating far more than they've introduced 'challenge'. The people that were complaining that Grandmaster Nightfalls were too easy are not going to be sticking around in Adept Nightfalls for example, so there's no reason for Adept to be made more difficult. Just revert it, but leave high difficulty activities with the increased difficulty.