Yeah, some of his early stories were enjoyable. I just question whether you can attribute the "great ideas" in them to him.
The Long Halloween was equal parts of "Year One" and the "Godfather," with dashes of other, earlier, bat stories thrown in (primarily Harvey's story) and even a dash of "Silence of the Lambs" (Calendar Man). Entertaining, but hardly anything in there can be considered a Loeb "idea."
Same thing with "Superman for All Seasons." It was basically "Man of Steel meets It's a Wonderful Life."