I have the right ratio now. I had a candidate for the first four-word phrase derived from the title,, but it was too short, The 16 redundant words led me to the second part of the "additional element", which ties in with my candidate phrase which I now believe to be the second four-word phrase. This leads me to a six word "phrase", perhaps the same as the one that Walterloo has. Like Walterloo, I can see that phrase in the grid, with some redistribution, but the redistribution doesn't tie in with anything I have at the moment. Perhaps my six word phrase is the theme. If so, this implies that some letters/words to be highlighted are doing double duty: given that the letters in my second phrase form a subset of the omitted letters, this seems possible.