So what i meant earlier about a rush job with the black order is that in the books each of them has a unique "niche" that individualizes them.
Ebony Maw is telekinesis/telepathy, Cull is basically a "Hulk", but Corvus Glaive's ability [apart from super soldier physical attributes] was immortality. As long as his scythe thing wasn't destroyed, he survives/regenerates from any injury and even obliteration.
More so than that, Corvus is actually the GOAT of the group [Thanos favorite one] and is every bit as charismatic as Ebony Maw. He invades planets with those creatures we saw in Wakanda, and after he kills all of a planet's greatest warriors, he goes to their leaders and says Thanos will accept your surrender if you give a "tribute". A 'tribute' being the decapitated heads of the oldest child in every home. And of course he's smug about everything.
Proxima Midnight is Corvus Glaive's wife, and is "Wonder Woman" [or perhaps "Valkryie"] physically, with a cosmic lance comparable in power to Thor's hammer. Disperses energy and can basically become a "light saber" lance when thrown.
Basically these 4 together are Avenger's level villains on their own. But obviously Corvus and Proxima had to get dialed back a bit bc not enough time for the personalities, and bc Cap/Widow/Falcon had to have someone to fight.
Eh I read the entire Infinity arc + most of Hickman's stuff and this thing about the Black Order being misused/underused is overblown. These aren't super historic characters with super unique abilities, any villain can have this stuff or be in these roles. In the comics they kinda just randomly show up anyways and while threatening, mostly have minor/supporting roles. Not to mention it still takes multiple Avengers to even kill off one. Yes I would have liked to see them fleshed out more but I'm not really that disappointed by it