Yes, the Exhaust Phial deal stun/concussive damage to monsters which is a big help in hunts since you can actually KO monsters by just spamming the morph combo of Swagaxe. You can
MHW Iceborne: Paralysis, Exhaust & KO Switch Axe Builds | Safi's Bindaxe | High Status DPS - YouTube
Hammer | Monster Hunter Rise Wiki
MHW: Iceborne | Best Hammer Build Guide | HGG
Hammer | Monster Hunter Wiki | Fandom
Best War Hammer Build - New World Wiki Guide - IGN
What do you guys think of the hammer build I've been working on : r/MonsterHunter