I have a similar decision as well.
However it's complicated by the fact that the release day phone has one dead pixel, less then stellar battery life (both of which were fine before update), and a touch screen that seems to register random double taps on Google maps. The last problem has me really worried it could be a symptom of a bad screen.
The new phone has the same inferior contrast as the one you have and has so far crashed twice. On the positive side the battery seems better, the screen is a little brighter,there's no dead pixel, the quad score was 10pts higher, and a few people swear the call quality sounds better.
So now I'm left with the option(s) of:
Holding on to my old phone, switching the battery, hoping a patch will clear up the pixel issue, and praying the touch-screen problem goes away or stays relegated to Google maps.
Staying with the new phone, hoping the crashes were isolated instances, and dealing with a screen contrast that's a slightly lacking.
Or returning the new one for another new replacement and seeing if it is the best of both worlds...
Opinions?