I was hoping that the era of Flaming Cliffs is over. 
What can I say...? After palying DCS series i don't want to come back to the FC3 until it will be more like DCS than old Lock On. 
From my point of view it needs a lot of work so I suspect that it can't be done in short time.  A lot of suggestions has been said in this topic and until FC2 release so I hope that you will look one more step back.   
I'd like to see:   
 Reworked missiles phisics 
New advanced flight model for fighters 
New F-15C radar and avionics 
 
I think I will not see these points in FC3.