I'm addicted to the detail - that no other camera gives me - so I shoot in RAW all the time. There is no "eco" mode in RAW. Wish there was, selectable on the fly via a function button. I also don't always need 36 Mp. 12 or 16 would be enough for a lot of my general purpose shots.
If you want to shoot the occasional snaps that don't need the high level of detail then suggest using one of the jpeg modes. Jpeg "small" at 3680 x 2456 is still a 9Mp image....but when using Jpeg you can't alter the white balance, in-camera sharpening, ADL etc after the fact....so you must get it right in-camera.