I highly doubt that is their intention. Even so-called casuals can reach 800 paragon. If they can’t, they weren’t sticking around anyway for the long haul.
Sure, these recent seasons made it easy to power creep up there - but capping paragon at 800 is just crippling the entire end game. Tell me how many paragon 800s you’ve seen clear the highest levels of difficulty in the game?
Sounds like another Blizzard move: dead on arrival. It will be more dead than Diablo IV’s season 1. 