The guys from LXQT desktop (formerly Razor-QT) are finishing all details to make it usable and stable. The new desktop is able to do common tasks, using the file manager and configure the look and feel (even I've had some troubles to enable Box theme). But this promises to be a great desktop, and fast. One polished the RAM consumption (see LXDE blog for details) the DE will be ready for everyday's use.
I doesn't look so bad, does it? What do you think about adding a QT session to Lubuntu?