Way better! But I would also increase the contrast on the buttons a little, good advise is to squint your eyes a little and see how much you can still recognize (you should at least be able to guess that there's something written on the button). I guess you always have to think of people with bad eye-sight who aren't able to see low contrast, I know that from my sister who often has problems with reading, because it's kinda hard for her to see small letters or low contrast stuff. ;)
I think I remember something about 20-25% in brightness difference... or something like that was a tip from my typo teacher back in school, haha.
Example:
50% brightness bg, 25% on the dark and 75% on the bright font. And it might be still a little hard to read for some people XD
But I often have a problem with contrast aswell ;)