https://youtu.be/Y1V2VG0UT28
Helldivers 2's new update completely changed the endgame meta. Today we review all the changes to weapons, stratagems and mission types in this gameplay test...
Video and title aren't mine. Just posting for discussion purposes.
I don't agree with your points. The nerfs and the buffs were really needed, because what's the point of having any other weapons or stratagems if 99% of the time players won't be using them. The Shield Generator is still good. The Railgun is still good, even though you can't one shot Bile Titans and deal easily with the Chargers. The Breaker is still good. But now they are more on the same level with the others.
Basing this in my experience with around 100 hrs in-mission time (I can't check the exact time currently).
This is a good read as well: https://www.arrowheadgamestudios.com/2024/03/balancing-the-firepower-in-helldivers-2/
Happy Helldiving!