Steam Cloud sync for DoW and CR is so long. Soooooo long, it takes forevaaaaaah! I easily finish with watching an entire episode (sometimes even 2) of Ghost in the Shell while waiting for it to finish. Occasionally I even forget its still syncing, and after trying to start some other game it doesn't start - because sync is still in progress.
Regarding sound, once again - in DoW2 and CR. After a while sound just starts echoing, lagging, and generally just sounding weird with combination of previously mentioned sound issues. In the beginning its all fine, but after larger fights are in progress I just can't differentiate fighting/talking/music sounds from each other, everything sounds like some weird mixer of everything. Not having issues in other games, including Retribution.
There you go, I hope you'll find some time to fix this. "Hope is the first step..."