I recently upgraded from 2.2 to 2.5, and i have to say, despite all the great additions, one change I have is the color samples panel. I loved how it was a docked palette, and while it offers more features no, I hate that it is a free floating window, since it takes up more room. It is not a big deal on my mac desktop, since I have a big monitor, but on my tabletpc it is only a 1024x768 screen. If we could have the option to have it be a docked panel, or the new style window, that would be great.
I love Artrage (first app I felt I had to buy multiple copies of for multiple computers), and while 99% of the interface is perfect, I have to disagree here.