Oof. If the intended vision was much more difficult, then going back to it after the playerbase got used to easy version over almost 4 weeks won't go smoothly. Good luck.
Easier than if they'd been used to it for 6 months. But yeah, we're not surprised that there are strong emotions, but people will adapt quickly. I will say that these changes should have less of an impact on the difficulty than I'd like. The primaries aren't really that much of a variable on the top difficulties, but the changes to the railgun and shield backpack will hopefully bring some more thinking back into the game.