I've been playing around with this one today and thought I'd better put up an image on screen before going any further. Funny how I can spot things that need to be tweaked or changed better on screen than off. I'm staying with the same palette and starting to define the dragonfly. I added some blades of marsh grass for composition's sake and deepened the values in a few areas. My instincts are telling me I need to get some darker values going on, especially on the main subject to make it pop.