I will take your criticism of the decline of Blizzard as an admission that yes, you do want to hear my ideas for an original setting which liberally clones Starcraft.
One blog summarized the underlying trope of Starcraft and similar settings as a three race archetypes of celestial, terrestrial and infernal (originally called diabolic, but infernal sounds closer to the other two). Starcraft was always tropey as hell and only got worse with time, but the original premise is workable even if it is bland and derivative.
So we have three races of celestial (space roman elves), terrestrial (humans), and infernals (bugs). Each of the three races has distinct aesthetics, motives and, for video game purposes, building/unit/resource fluff.
The terrestrials, I think, draw their aesthetics from an eclectic mix of dieselpunk, atompunk, cassette futurism, cyberpunk, space cowboys and good ol' boys in space. They appear dirty, ramshackle, and generally gritty. They have mobile suits, mechs, robots, cyborg horses and such. They are divided between several political bodies across the Terran sector, with the most notable being the Confederate States of America, the United Nations of Earth, the Global Corporate Congress, and La Résistance. The dystopian elements are omnipresent, with even the "good" factions like the United Nations of Earth and La Résistance being willing to engage in highly unethical means to protect the rights and freedoms of humanity. They are the only side to utilize AI (to distinguish them from the other two), and extensively so. They are pretty recognizable already so I don't really need to describe much more about them yet.
The infernals are pretty much your generic devouring swarm: Giger's aliens, Starship Troopers arachnids, tyranids, zerg, necrophages, flood, necromorphs, blah blah blah. What makes them stand out is that they have personalities and a familial dynamic, because their shtick is that they are trying to marry the strengths of diversity and unity in order to avoid becoming locked into evolutionary dead ends. They are organized into a hierarchy of hive minds with a genetic memory, their hardwired motivation being the pursuit of apotheosis by consuming the strongest species in the universe (and everything else in their path). Like the tyranids, each of their swarms is named for unique giant monsters from Earth mythology such as the Sumerian Tiamat, the Norse Kraken and the Hebrew Behemoth. Unlike the tyranids, swarms are typically not self-sufficient and specialize in pursuing particular roles such as first strikes, bounty hunting, mining, aerospace operations and so forth. The units/structures of the infernals are all engineered bioweapons, including their ammunition. Their unifying biological distinction is that the infernals are a parasitic race of tiny detritus-eating worms that infest the bodies of other species and either breed them into more suitable forms, or render them down for raw materials, using a unique ability to manipulate genomes and exchange this information telepathically.
The celestials draw their inspiration from the romanticized depictions of ancient civilizations like the romans and egyptians, the occult revival of the 19th century, the new age religions of the 20th century, and basically they are fruity and twee to a tee. Where the terrestrial army uses a mix of people, mutants, cyborgs, piloted mechs, and robots, and the infernals use exclusively living soldiers and even ammunition, the celestials transcend concepts of biological and technological (this ties into the metaplot, as I will explain later). Their psychic technology is so advanced it appears like magic to lesser species, and even their physiology is barely decipherable. They use your generic new age crystals in everything, but rather than being manufactured like the terrestrials or gestated like the infernals, the celestials use more esoteric means to make their goods and then teleport them onto the battlefield. Their tech is super eco-friendly not unlike the Night Elves of Warcraft 3 (to distinguish them from the destructive terrestrials and all-consuming infernals), along the lines of building living cathedrals out of sentient singing forests. Even their attacks typically appear esoteric, such as attacking with songs or singing while attacking or defending themselves with "sound barriers" (these are force fields, but I need some way to distinguish them from terrestrial force fields to maintain distinct aesthetics). They seem to really love pyramids and fluted columns and other Cyclopean architecture. A key contrast between their tech tree and the other two is that every unit/structure is effectively a person, rather than a servile robot like the terrestrials or a component of a gestalt consciousness like the infernals, even if they otherwise resemble those positions from an outside perspective. I don't really know how best to describe them, except to say that their inspiration is drawn heavily from the surreal villain designs of 1990s and 2000s mecha anime and video games. (I haven't described their culture at all yet, but you can probably guess it liberally clones the eldar and protoss cultures, especially the elements that Blizzard discarded like the caste/path system and the tribes/craftworlds. I can go into more detail later if desired.)
My idea for the basic plot of the clone is to recycle the basic plot from the original 1998 manual, ignoring the later additions of queen of blades, duran, and the united earth directorate because they are completely unnecessary. As a quick refresher, the basic plot is that the infernals start the war by invading terrestrial space and a nearby fleet of celestials interferes (there's a lot of lead up to this but I'm sure we already know what that is). A lot of panic and civil strife ensues. The goal of the infernals is to harvest terrestrial mutants for psychic mutations that may be weaponized against the celestials and allow the infernals to survive a prolonged conflict and ultimately assimilate the esoteric bio-techno-sorcery of the celestials.
In other words, this is a rip-off of Starcraft with only the most minimal changes to avoid threat of lawsuit. Even if Blizzard does try to sue, I can always invoke Warhammer 40k, Atrox and StarFront as examples of the same premise.
I think I already posted a thread about this months ago, but I cannot find it right now so I am re-posting my ideas right here.