Alright, so you wanted warglaives to be demon hunter-exclusive because they were the fancy new class in Legion and you wanted them to have all their special bells and whistles. An exclusive weapon type was still probably going overboard with all the other special exclusive stuff in their kit, but whatever, weapon drops didn’t exist in Legion anyway because we were all stuck in that one-and-done artifact weapon system.
But we’re not anymore. Warglaives being exclusive to demon hunters was always a dubious decision lorewise, as plenty of non-demon hunters have used glaives (and even used them as their signature weapons) before and since Legion, and now it’s frustrating gameplay to have an entire weapon type that you can’t so much as collect a transmog for if you’re not playing one specific class. It’s high time that more classes be able to use these things. To that end, let’s go through the list in order of priority:
Warriors, Rogues: The OG wielders of the TBC Warglaives of Azzinoth, it seems obvious that both classes should be first in line to get access to this weapon type now. Warriors in particular have always been known for universal weapon proficiency (sans wands), and aside from demon hunters themselves, no class better exemplifies the agility-based weapon style associated with warglaives better than Combat rogues.
Beyond that, things get a little dicer. …no pun intended.
Shaman: Glaives have been the signature weapon of troll shadow hunters since all the way back in WC3, and shaman are one of the classes that hero is represented by in WOW. Further, enhancement shaman in particular have long been in a frustrating place in terms of weapon acquisition, due to Blizzard’s love of 1h swords, and being the only 1h melee spec that can’t use them. If Blizzard is determined to die on the hill of not letting shaman use swords, giving them warglaives would help to mitigate the issue.
Hunters: Like shaman, hunters are the other WoW class that represent the WC3 shadow hunter, and further, share the representation of WC3’s night elven Sentinels with warriors, who also used glaives as their signature weapon. Hunters take a back seat to shaman in this case solely because they currently have no spec that revolves around using 1h melee weapons, but should Survival ever receive an adjustment that makes dual wielding a viable option again, warglaives would absolutely be appropriate for them.
Monks: Monks absolutely fit with the agility aspect of warglaives, but their appropriateness is significantly reduced by the fact that monks don’t actually wield their weapons in many of their combat animations. This is obviously a subjective issue, though. More pointedly, the class has no prior association with the weapon type, and if anything, the unique animation suite attached to warglaives conflicts with the class’s aesthetic of weapon being secondary to unarmed prowess represented by its own unique suite of unarmed animations.
Death Knights: Death knights have no prior association with warglaives as a weapon type whatsoever, and are heavily tied to a very specific theme and aesthetic of classical European knights fighting with straightforward strength that spinny, agility-based weapons conflict pretty hard with. That said, they can at least dual wield.
Paladins: Paladins actually have a little more leeway in terms of the Euro-centric knight aesthetic than death knights, surprisingly enough, given the existence of Sunwalkers, and the case could be made that the glaive-wielding blood elven spellbreakers of WC3 are related to paladins in WoW. But, the spellbreaker connection is a bit of a stretch, and no other interpretation of the class fits with the aesthetic of warglaives’ combat style. Especially given that warglaives are heavily encouraged to be wielded in pairs, and paladins can’t dual wield.
Druids: Can’t dual wield, no strong prior association with the weapon type, and both the class’s melee specs subsume their weapons into their animal forms.
Mages, Priest, Warlocks: All pure casters. No pressing reason for any of these classes to gain warglaives.