I take hytek's point and having worked on a game mod, I completely agree, it is bad for business mainly and bad for beginners of the game.
Having said this I would introduce more random play in other ways.
Weather should affect ground attack, ground attack should be difficult depending on weather. Sometimes the Tigers will dominate, sometimes the Typhs will dominate, free-roaming as it is now causes a certain inevitability to planning missions. Plans should be affected by random events somewhat, affecting the team, but not individual planes or players perhaps. Not sure how you could do this though, but it would be great to see people having to respond to short-term random changes in the balance of the game.
It does seem unrealistic knowing that you can guarantee a 29 will reach alt and all 3 drones will not have engine trouble. In 1945 the 29 was still having teething problems and the way it is used in the game is not how it was used in 1945 always.