In starting out to re-read the Great Commentary I was browsing around to generally reset my sense of historical context and to see what other more recent commentaries might exist on the Dazhuan. I stumbled on this article by Roger T. Ames.
https://link.springer.com/article/10.1007/s40636-015-0013-2
I am not familiar with any of Ames' work. I found this article to be quite difficult to read. Ames' manner of communication and use of language was pretty tough for me. He uses a lot of words that are just not in my working vocabulary. The article seems very academic.
Still, there were a few insights I was able to gleen from the article. He also cites heavily from Tang Junyi, who I am not familiar with either.
Thought I would throw this out there to see what the Bum's thought.