He was a brilliant musician, but he was often too idiosyncratic in his approach. I think the Times obit was a fair reading of his tenure at the NY Phil - sometimes conducting brilliantly, but just as often completely frustrating.
I'm still a great admirer of his "integral" set of all the Tchiakovsky symphonies, including the "Manfred" symphonic poem, recorded with the Vienna Philharmonic in the mid-60s. To me they're excellent in every way, and this Balanchine addict especially appreciated having the Third Symphony - the music for Balanchine's "Diamonds" - in such congenial tempos, among other virtues, that I could play the recording, stare at the wall, and see the ballet (however intermittently), long before we had videos.
I heard other Maazel performances which put me in mind of whoever said, The reason for doing it again is to do it differently; but I'm one of those who thinks an artist is as great as his best work. I don't subscribe to the custom of summing up or averaging out a career, because when I experience the best work I'm not experiencing the others - they might as well not exist.