Well, sure, it's better to get things when they are actually working. But you know, it's not like it must be either released bugged versions or delayed working versions. Sometimes people are actually able to stick to their schedules without delaying it by months.
That being said, it can all happen and nothing will change for me without 2.5. However i would have liked for them to update Caucasus before Nevada and the Normandy map, because Caucasus is the map everybody has and will get, especially those new players who might approach the sim for the first time and might enjoy even more the reworked map.