bluntforce - 7:08 pm on Sep 23, 2012 (gmt 0)
If your index page, which has replaced your "blue widgets" page, although at a lower level, has less text and internal linking then it might make some sense to experiment with that. You have complete access to everything about those pages, compare the differences.
You state that page is second only to the index in time on page. When a visitor enters the index page using "blue widgets" as the keyphrase how does the time on page compare to when they entered on the subject page?
I used the term "their keyword tool" and we are in a Google forum. :)