Eclipse is probably a rather worn topic for many balance druids. People love it, people hate it. The new design is great, the new design is terrible. It's too mathy, it doesn't function well in PvP, it's too gamey. There are a lot of positive and negative things that can be said about Eclipse. No matter your side of the fence, there are always attempts to improve upon Eclipse, to make it more viable for PvP or less annoying in PvE.
A fair warning, as I attempt to deconstruct both the Eclipse system itself and the common suggestions that arise: It will be impossible to avoid all math. Theorycrafting may not be everyone's cup of tea, but I promise to keep it as minimal and easy-to-understand as I possibly can -- for both our sakes.