I never needed prone to have fun, I wouldn't miss it very much if it wasn't in ps2. In a lot of games I never used it, I felt the only reason to really use it in most games was to hide briefly as something went past and get the jump on them or move onto a objective usually the latter. Examples would be avoiding a tank...or a huge amount of enemy soldiers. So it does have it's merit in that regard for me.
More often when someone decided to prone for long periods while defending they would eventually get a grenade throw at their face!
