Definitely would be interested to see photos taken with the new flash but I've never seen photos taken with flash even on high end cameras that look better than natural lighting. Even if the coloring is better, you'll still have the added shadows from the flash if the flash is straight on. Now a larger aperture would allow for the natural photos in dimmer light. I'm not a photographer by any means but I can take some really decent photos with my iPhone and always have the flash turned off.
Without a doubt you're right. I am a photographer (ok, not a professional one but I use pretty high end photography equipment compared to the average person) and I will avoid flash whenever I can. Usually this is accomplished with a tripod and a still subject (and a long shutter speed) but that's really not possible with the iphone (not in my experience). Having said that, sometimes you are out with friends and just want a shot of everyone. Pictures without any flash will be grainy & probably blurry so sometimes I do use the flash even though it's not ideal. Now I'm hoping the flash photos will just look better without needing to run them through Snapseed or something to fix the color.