Awesome... Right here goes,
1) Oil slicks from damaged ships.
2) Waves, on the sea.
3) The pilot bailout animations introduced.
4) Even more CEM.
5) Ability to look around when parachute is deployed.
6) Hailstones

(smashed windows)
7) Fire damage I.e. black burn marks.
8 ) Better collision models, bombs and debris as well.
9) Lightning strike hits