All of these weapons hit for 53 poise, but they hit almost twice as fast as a greatsword.
If you hit someone, and it stuns them, you can hit them almost twice before the stun is over. So even with 53 poise, it's relatively easy to stunlock an opponent.
Due to their attack speed, they are insanely effective in bossfights, and you can even stun most bosses with a mace, including smough, ornstein, the centipede demon, and Gwynn.
They tend to do extremely high damage for their speed.
Most of their R2's can hit during the recoil of a kick, allowing their R2's to get counter damage.
The recoil is litterally to balance out an overpowered weapon. It's immensely neccesary, and these weapons are extremely effective if used appropriatly.