I haven't tried the summer offensive map pack, but I have played some RO. Overall, I think it's pretty good. Not perfect, but neither is Inf. The massive sway does annoy me though; in my experience aiming real rifles, sway will not move your weapon over more than about an inch. In RO, there seems to be almost half a foot between the highest and lowest points of sway, particularly when low on stamina. This is another thing that annoys me; when you're tired and breathing hard, your lungs do not get any bigger; thus the amount of distance your weapon moves does no change much, if any. What does change is the pace of the sway; you don't really breath any deeper, you just breath faster.
But the asbolute worst is the way sway increases exponentially the longer you shoulder your weapon in RO. I'm sure your arm does get tired after holding up a rifle for a long time, and even I've noticed that sometimes I make my most accurate shots right after bringing the weapon up to my shoulder, but it's not going to make your weapon swing wildly left and right for several inches after only about 10 seconds the way it does in RO. I live fired a Brown Bess musket for about 2 hours straight this summer; not only is the weapon relatively long and heavy compaired to modern weapons, you spend a lot of time holding the weapon in your one non-firing hand for extended periods while priming, not to mention wiping the flint, cleaning the touch-hole, cocking the hammer, changing the flint (I was having a lot of misfires) and I spent a lot more time with the weapon shouldered then usual, because I often had to aim and pull the trigger multiple times (one time it took 12 tries) before the thing actually went off. Bottom line is, after 2 hours, I still didn't see the muzzle swinging wildly left and right the way it does in RO; so I have a hard time beleiving holding a K98 for 10 seconds will do that to you.
Anyway, it does need some work in some miscelaneous areas, but overall, it's not a bad realism mod. It's still a lot more realistic than 90% of realism shooters out there.