Nam was an extremely unpopular game by comparison to 1942 or BF2, so it's really hard to judge. There was a class that had LMG, Rockets, and Paddles, or something crazy like that, so there was no need to play Recon ever.
I don't play recon, I don't camp and hide. I knife the ones that do, but it's not opponents that are camping that bother me, it's my own team, I can't stop them. Nothing worse than a guy who won't move into cap flags, or do anything else but sit and hide.
Prone just isn't needed, theres cover everywhere, rocks are better cover than going prone in some grass. Because you can peek over the rock and shoot, yet you are almost impossible to hit or see. Prones a thing of the past, all people ever did was find ways to exploit it. I like the solution of killing snipers with vehicles, but I also don't want to be required to tank. I am a tanker, I'm damn good at it, but in BC2, I probably have more fun as infantry, using landmines or being a medic.
I don't see issues with either of those. Snipers Art is extremely easy to move out of. And Medics with LMG's are fine, I have no problem going against LMG's while being other classes. Remember, Medic don't have the killing weapons like Assault, or Engi, they got their gun and a pistol. They dont have the opportunity to kill a tank, or destroy a wall to find someone hiding, or to abuse the CG or Noobtube.