poise in ds3 works fine. you're just a salty loser you can't wear the heaviest armor and just tank out other players attacks.
People spent half a year trying to figure out how the mechanic works and even paused the animations frame by frame just to see the difference. If it requires that much effort just to see how the mechanic works in action then it's clearly a bad loving mechanic if no one can figure out HOW THE forget IT WORKS
Heavier armor is suppose to do as intended, tank out other player attacks.
The poise in DS3 made heavy armor 100% useless and not worth the stat investment.
Before DS3 all builds were viable but in DS3 heavy builds are no longer viable.
It's bad gameplay, bad design and Fromsoftware themselves said they loving handled it poorly.
This is what happens when a game company listens to too many complainers. There were weapons like blunt maces and hammers, etc that were designed in the game to tackle poise but no one wanted to use them. They just wanted to estoc spam and were wondering why they can't stagger anyone to death with heavy armor.
And guess what DS3 basically became an estoc spam fest.