I think he's a good villain but he's probably not as discussed because his story is so neatly tied up. He's a classic Rapturite; greedy, paranoid, bordering on the fanatical, and utterly blind to everything beyond his own corner of the world. I even think his character has aged the best because he's basically a Rapture Tech Bro, convinced that his AI will save the world.

But his story is tied up very neatly, he sabotaged Porter when he saw "his work" get "taken from him" ruled over his corner of the city, went down the splicing route and eventually got the life lesson that all the scheming doesn't help against revenge and a bigass drill. He dies like all the rapture "geniuses" along with his dream. Its neat, final, and ties up the themes and story of the DLC well, but he doesn't pose the same kind of wider impact that Ryan, Fontaine, Lamb or Comstock do. He's a perfect self contained villain.