I've been debating developing/posting this, but I thought it was awesome and could add a lot to our ops, so here goes. The craters that the B-1B creates when it drops bombs can now be seen over multiplayer:
Aircraft do collide with these by default, so a B-1B can literally make an airport unlandable now.
GBU-31's now display a hit message if there's any aircraft nearby the explosion site. Due to the way the mpmessaging works, it'll probably only show one hit - so it's advisable that if damaging an aircraft is your goal, only launch one GBU-31 at a time.