Yes, 6 was brighter than 5. It's when they screwed up the dial pad.
Now they've pretty much removed design from the interface. It's flat. It's childlike in it's colors. It looks very microsoft. The 2 and a halh D dimensional cues on the icons really did help separate things. It now looks cluttered in the same amount of space.
I will stand by my original comment. I just want a dark color scheme. I use my phone in low light a lot and all the white space is like a flashlight in my face. It's not papar. It's projected light, not reflected light (print designers feel free to look it up). I just want black backgrounds and white text. No, invert does not help, it inverts everything and all the color objects look even worse.
Overall design and usability verdict. Function: 9.5, form: 3
It works great. But a giant step backward in the way it looks.