I and my friend have the same "problem" Lost, but it was mentioned in other threads, and we just figured it would get worked out slowly as the beta progressed. But we do get "slide shows" towards the end of our games. I'm guessing it had something to do with all the mines; we stopped using mines (and never play with/against Varasi), and it seemed to help quite a lot.
As for desinks, I and my friend were talking, and we dont recall having one (via Lan games) in a very long time; but they seem common online, I wonder why that is? In fact, since when we played online, we used ventrillo (which makes it hard to remember if you were talking online or in person), we are not even sure we have EVER had a desynk during a lan game; if memory serves us, only online. Anyone else get the same ammount of Desynks with Lan play as they do online?