I thank everyone for the replies--they are very helpful.
I just got back my second batch, this one with Portra 400NC, Portra 400, and Fuji Pro 400H. What an interesting comparison these three rolls have made. I note that there must have been something amiss in my first batch of Portra 400 (the new version), as this roll looks much, much better. I gather it was either in processing, or with the photographer (me).
I think some of what I saw may have been a result of the lighting conditions. In ther first batch, I noticed that my notes indicated that I shot many of the photos around noontime. While I avoid this during summer month, I suppose this may present something of an issue even in fall or winter. In any case, I like what I see in both the new Portra 400 and in Pro 400H. Both are nice films, and I will continue to shoot both until I can declare a "winner."
Thus, I take back my remark about Kodak "ruining" Portra 400.
I welcome any further comments or suggestions.