He certainly was not one dimensional. I hardly know anyone who only does one thing, and a lot of people I know feel somewhat imprisoned by their so called "style" which far from being something to strive for, is actually usually an impediment if not concrete and rebar. His work was always distinctly his own, but not possible to be packaged and rubber stamped. Since he worked for clients, he would need to use techniques appropriate to the job. That alone is enough to require one to roam a bit, and he did, with elegance.
I would not suggest that he wasn't a really great master of the medium, one of the absolute best. However, I read here on APUG Ansel, Ansel, Ansel; his way of thinking and working was definitely "other than Ansel". I suspect that you may be correct about his negatives, but hey, I've never seen them. Anything we can say (unless someone here may have worked for him in the lab) is pure speculation.