I think that the kill cam will only ever be a problem for snipers camping in a single spot. For what it’s worth though – the kill cam wasn’t a huge problem in the beta, if anything it made it more exciting I found, as you knew that the person now had an idea where you were so you’d have to keep moving.
When I played the beta I didn’t use the sniper kit that much, the game was too enjoyable when it was action-packed, to just sit back looking down a scope
Oooh that reminds me – not sure if it’s been mentioned anywhere? But a cool feature I liked, made better by a surround sound setup, was the noticeably different sounds to sniper shots: you could tell whether it was a near miss or in your vicinity by whether it was a ‘crack’ or ‘hiss’ (bit like that scene from Black Hawk Down). It really helped to pin-point a sniper's position imo.