I just bought 6 random WW issues for a buck each from the period you have reviewed Scott. You were much kinder to these than I would have been.
My overall impression, one that I generally feel for 90% of DC's 70s superhero output (leaving out the obvious high points, and nice work on some of the non-super hero titles) is that many of the creators and editors seem extremely jaded and just didn't really give a s--t about the titles they were working on. I can't prove that and don't even really want to think it's true, but I can't deny having that impression.
I'm usually more on the side of seasoned pros working on books, and against the 2nd and 3rd generation fanboy creators ala Marvel, but damn some of DC's books during this period like Wonder Woman make a valid argument towards putting a fanboy on the book, since at least they would care about what they were doing.
It's kind of damning that Marvel was still pushing some boundaries during this time, love it or hate it. Meanwhile DC seemed to be languishing in mediocrity on books that should have been flagship titles.