I can't really tell from your pics, since bringing the nozzle up will make porpoising worse. If you are properly trimmed and have a problem, check the angle on your plate. Although 4* is a common starting point, I run 2* with the E pump on my Advantage. Drop it a degree or so and check check if it's better. Sounds like you're trying to lift the bow without enough HP. Getting your tune optimized may help also.
As far as unloading, I would work with your plate BEFORE adding a loader. If adjusting it helps keep it loaded, then try a ski loader. It's a slow process, but remember to just make one change/adjustment at a time. If it gets worse, you'll know what did it and be able to go back to a previous setup.