i hate it because it might as well be an auto-success to the point where when you fail despite it, it feels like it's mocking you. i don't want my class features to mock me.
i feel like it'd be better if either it was basically an auto-success, or if it was replaced by slowly getting...
okay, let me explain why this doesn't work.
let's say you start as a herald and multiclass into fighter. okay, your exertion pool is equal to your PB. now let's say you start as a fighter and multiclass into herald. okay, your exertion pool is equal to twice your PB.
this is the inconsistency...
i consider muskets and pistols a little early for steampunk. i usually consider steampunk arms to be more late victorian - repeating rifles, shotguns, revolvers, and weird steam-powered contraptions.
if you get a regular exertion pool you can't get another. so if heralds get a regular exertion pool then a fighter dip doesn't give them a second, even if the herald can spend exertion to cast herald spells.
not a major one, just that it kind of removes some of the herald's identity with its...
unfortunately this creates the same problem as the exertion being on a long rest in that now you have to create a multiclassing exemption again so we're back at square one.
that said, pb*3 is much less of a problem then converting the spell slots you'd have into exertion to be regained on a...