Gameplay tweaks from the 1.5 Patch for Battlefield 2 did the following
Added Battlefield 2142 style prone deviation (going prone will now cause reduced accuracy for a brief period) - " Strategyinformer "
Increased the time to go prone after jumping from 0.3 seconds to 0.7 seconds - " EA "
The added prone deviation dramatically changed the infantry gameplay in Battlefield 2. It was a huge aspect of the game...
Video of comparison with before and after prone deviation