Now for my contribution. The other day I was playing and I noticed from the Killcam that the player who killed me actually could see me cloaking even though I had cloaked ~30 seconds earlier. This likely seems just a sync issue with the server and clients. My ping was way low (if the in-game metres are to be believed) and my connection is well-suited for most everything (very little actual "lag", so good job on that too - prediction hard at work ).
In a match a short time later, I also noted a similar problem where my melee attack went clear through a player. After the initial spook of being blasted by what I thought was a corpse, I watched the replay and SAW my arm going through him. Physics glitch? Lag? I'll leave that in your hands.
Thanks guys, keep up the good work. I hope (unlike some other devs out there) you actually stick around and patch the game and improve it over time instead of releasing one or two patches, then a bunch of paid content. That's such a lame route to go, patch the **** out of it - us fans count on it