I like the style, too. Even beyond From Hell for which his style fit perfectly, I'm a fan of Campbell's art in other comics. I'm just saying they had to go through elaborate hoops to hide the reveal of the twist in the movie version, because the real life actresses were instantly visually...
Yeah, his art fits perfectly, but the shitty Johnny Depp movie they made highlights the fact that the story's twist ending mostly only works because Campbell's scratchy art style makes all the female characters look the same.
Don't you feel like Moore just took all of Sinclair's work wholesale and presented it as more or less as his own story? It's a good comic, no question, but it always felt a little dishonest.