ok, now I have tried to upgrade from 12.04 to 14.04, and using flashback with metacity:
1) the indicator-applet crashs constantly (paste.ubuntu.com/7206916) - while I do not rely on them, it would be nice if these worked. I have also xfce installed, and the indicators work flawlessly there with the xfce-indicator panel plugin... I will provide more info if needed
2) the system menu as I knew it is gone (I have used classic-panel in 12.04, which was a fork of fallback, which had restored the system menu) - Is the the settings.menu file is not used any more? An option (dconf key or so) to get that back would be great.
I do not understand how this new system tools menu works, it is hardcoded? I wanted to get some launchers into it, but I just could place them into the Administration or settings submenus...
3) the tooltips are not word-warped any more, meaning that if you write more text then usual in a .desktops Comment= tag, it spreads text over the whole screen, instead of being warped into a nice formfactor. I also experienced that when I try to alter a value in dconf editor, if tha value has a dropdown menu, it also spreads to the whole width of the screen
4) the size of the menu is not any more controllable?
https://bugs.launchpad.net/ubuntu/+bug/1285683
gtk-icon-sizes, panel-menu-bar panel-menu set to 16,16 does not work any more...
I really hate these gnome devs
5) custom keybindings are not possible? the metacity ones do not work anymore, the mutter ones neither...