Should be adjusted to reduce stamina cost by a percentage (~20-30%) instead of straight integer to make it more versatile between weapons and changes to the game.
They have done a lot of work throughout the time of game. Trying to make everything being somehow balanced.
Someone has decided this garbage change with stamina. Without thinking, its not actually that simple. It affects a lot of things that would also need to be adjusted according.
Either way, even then, it would still not be a good change.