I really like this plugin, I have been using it for a while. One of the first things I did was 'hack' it to load high resolution thumbnails. That is, use maxresdefault.jpg instead of 0.jpg. Then a few weeks ago I absent mindedly updated the plugin, and overwrote my changes. So tonight I spent some time trying to remember how to do that again and got it figured out.
But I thought this would make a great (and easy to implement) feature. Maybe a checkbox to turn on high res thumbnails? The page looks sooo much better with them.