I'd blame vcbuild/msbuild for its oddly limited parallel build rules. If you feel like switching build tools, I've personally used cmake, bjam, waf and qmake /w makefiles. All parallelize on both Windows and Linux. I'd recommend cmake or qmake /w makefiles, though qbs is worth looking into.

We certainly don't all agree that the moc should go. An extra compiler adds complexity to the build, but the build is fast and the generated code is simple. That said, I'm interested to look into CS's alternative.