Why would you want the raids and so on to be harder? If you want it harder just do masters and gms always then like not everyone wants a struggle everytime they boot up the game
Every raid and dungeon before witch queen is insanely easy in comparison to what we have now. Mechanics may still keep some newer teams in an encounter for a while, especially for deepstone, but I rarely see anybody dying to enemies as long as they have raid and dungeon ready gear.
And sure, there is a master mode for VoG at least, but not everybody likes champion spam. And of course master doesn’t exist for the other earlier raids and I think it was removed from grasp of avarice because of duality.
Not to mention the loot. Pit of heresy, shattered throne, last wish, and GoS all need a loot update. When we have perks like headstone, voltshot, and incandescent, nobody wants to farm a raid or dungeon for a weapon where the best roll is something like outlaw kill clip. Okay maybe some people do, but it’s a hard thing to justify. Why do a raid for a weapon when I can get an easily obtainable seasonal weapon that is 10x better?