Moving ~/Library/Preferences/com.apple.finder.plist doesn't help for me. Apparently (at least on my system), all windows opened via the Finder's "Show Package Contents" option are positioned & sized dynamically so that they always open in the 'in your face' location centered horizontally on the screen, about 1/3 of the way down from the top. I can find no height, width, or position info in the Finder plist corresponding to this, which I assume varies depending on screen size. (BTW, the same is true for sidebar width, which for these windows always opens in the overly wide setting I have so carefully tried to reduce in all windows opened normally.)
Moreover, spot checking shows that changing view settings of these windows never results in a .DS_Store file being created for the app or its Contents folder.