No use complaining - they made up their minds, and it's a dead ship in the water.
A tidbit of good news is that you can output even higher quality and smaller PNG images with Color Quantizer compared to Fireworks. And that includes png files with limited colour palettes of more than 256 colours as well! (512/1024/2048,etc) It also comes with a simple to use quality mask tool. This has become an absolutely essential tool in my workflow.
For even better jpg output control RIOT does a keen job: