What are the races that are in your opinion underused in the story of Warcraft ,whenever it comes to political presence, the resolution of societal and and economic problems as well as military or magic support during conflicts ?
I feel that the Dwarves have been really underused during the expansions of Wow with them being one of the strongest military, technological and economical powers of the Alliance with them being the second biggest provider of high tech to the Alliance behind the Gnomes and while it's clear that they can't have a navy as large as Kul Tiras or Stormwind fleets theirs could still be a really dangerous and useful one with them having steam-powered, better armed and protected ships than most human ships. I also think that it would be interesting to see more of their internal issues such as seeing the Ironforge senate and see if Wildhammer and Dark Irons became part of the senate and what is their representation here, and what problems there must be with it.
The Wildhammers too have their usefulness with their Griffon riders but also their proximity to nature with them having many Shamans, and it's possible that they could have druids if the Night Elves or the Worgens teach them, while the Dark Iron have too lots of technology at their side with their own cannons, riffles but also their mole machines that could be very useful for infiltration or sabotage; and their connection and use of fire and shadow magics such as fire and magma elements or void creatures and their Dark Iron Golems that can be reinforced by magic such as the Omnitron Defense System could be very useful to the Alliance.
The Gnomes too have been really neglected with their technological expertise and capacity to produce strange but far from harmless technological devices or weapons haven't been exploited enough in the story. I am pretty sure that they could have found lots of means for example to fight the biological weapons of the Forsaken or Goblins weapons or Old Gods or Burning Legion minions. It's also have been noted that Gnomish mages can be very powerful and that they have the most creative repertoire of spells of all arcane users races but it's almost never seen in the story. The city of Mechagon and what technologies are found here are for me telling about the things they could have done and what Gnomeregan could be if they had some real focus on and that they were finally allowed to restore their capital and move forward from their loss.
On the Horde side I find that Nightborne and Blood Elves' mastery and knowledge of magic, as well as their unique techniques haven't been used enough by the Horde during both the Alliance-Horde War, the war against the Burning Legion and the recent conflict in BFA despite the two races being among the most knowledeable and powerful users of magic in Azeroth. Lorthemar is also in my opinion one of the most interesting and reasonnable racial leaders and it could be interesting to see what changes and reforms he could bring to his people to help restore and better their society.
I also feel that the Taurens rarely if almost never do something really interesting or amazing in the story despite being the strongest playable race but also having a good versatility and number of magic using classes such as druids, shamans, priests or paladins and outside of Baine, Mayla and Hamuul they don't have many leaders and other characters who do something important in the story, and even these are pretty flawed characters who don't do that much in the story, outside of rebelling against tyrannical warchiefs in Baine's case.