So, my main confusion is how the Glaive even works now. Does it require Slash in order to be used, or should it be overriding Slash with its own skills? Clarification on this would be really helpful to know, especially considering I just released a class focusing on Primary Glaives.

After a little more testing, I'm still not sure... maybe it'd be better to revert the changes entirely.

please explain a usecase over why I would use the glaive in its current state over something like the hunter's axe
Glaive aim sucks and does inconsistent damage, you cannot attack with a dash, you have to reload if you want to get the guaranteed hit, despite other melee attacks have high aim by default (templar even being 100%), there is almost not a single usecase where 'swipe' will ever ever come into play
because the guaranteed hits can only come from attacks in blue range, why would I ever use it over a shotgun, which does way more damage consistently, and can be used from range, and has access to run & gun?
one thing is certain, and that is that it looks really cool, but I'm not sure I see a reason to invest highly in this weapon

i would prefer a toogle on/off or active skill, but at least it shouldnt proc and waste ammo when the enemy is already dead from first slash

I definitely think the changes should be reverted.