With Costa I take huge exception. Costa at that point was critically acclaimed, if not widely read, for his Cobra comics over at IDW. he’d started out co-writing with Christos Gage, but more than ably took over complete control later. What DC did, I think, was identify him merely as a G.I. Joe writer and stuck him on a book (Blackhawks) that didn’t really speak to his strengths. And then quickly severed ties with him when Blackhawks tanked. It took years, but Costa finally found a mainstream project relevant to his talents (Venom). You can make anyone look bad if you’re not using their talents correctly. Or a writer can misjudge their own appeal. I think that’s happened to Mark Waid for years. Although a lot of fans disagree, particularly his Marvel fans, Waid isn’t merely that guy you bring in for nostalgic appeal. He bursts with big ideas when truly motivated. And Greg Rucka, meanwhile, I think tried to go too big with his Rebirth Wonder Woman, when what made his Infinite Crisis “embassy era” comics was directly rooting Diana in a context she doesn’t really have without Rucka. He finally found her a role in man’s world, finally figured out what being an ambassador ought to look like.
Antony Johnston is another one. Marvel had him for a hot minute during one of its periodic "fall from grace’ Daredevil arcs, but promptly discarded him and no mainstream comic has featured his byline since. Which is a huge shame. His Wasteland is a modern classic. Oni knows it, and has continually supported it even past original publication. Image gave Johnston a few shots in recent years, and the results have been variable. The Fuse is a great concept. I think the fact that it reads like a TV show sort of gets in its way. Umbral looked sensational with the emerging Image coloring distinction going for it. Codename Baboushka is the Black Widow book that Marvel has barely attempted to make over the years, and it’s also a kind of mainstream version of Johnston’s own Coldest City, which was adapted into Atomic Blonde.
The needs of the medium oftentimes require snap judgments, and sometimes those judgments are off and unfortunately never really revisited.
Also, Fialkov? You’re totally wrong about him, too. I, Vampire was great. Poor readership has nothing to do with quality.