After finishing the campaign today, I would also like to give some feedback.
What I liked:
Very atmospheric use of fog and rain in the snowy landscape
A pleasant level of difficulty that might be too much for absolute beginners but offers the right level of challenge for advanced players
The missions are very enjoyable to play as they are not too long (well under an hour each)
The variety of tasks in the missions
What could be improved (outside of the bugs to fixed):
More mission context via voiceovers: in many places, the specific task only emerges from the briefing documents. Instead of a generic call to start the helicopter, further information from the co-pilot or ATC regarding take-off authorisation and rough direction to head after take-off would be useful. It would also be useful if more voiceovers were also available in text form and could be read via the message history. This would make it clearer which specific task needs to be completed next.
In general, more communication with people outside the helicopter would be helpful: in addition to the often sparse ATC, better voice over communication with accompanying assets, for example, would also be useful in order to understand that more bombruns are being flown before it´s safe to approach the bombed air defence location.
In general, the FARPs, bases (friendly and hostile) etc could be designed in more detail. Perhaps making use of the Massun92 asset pack, which is integrated into core DCS would be an idea to show more life on the ground in addition to the rudimentary objects provided by the base game.
Also the presence of more persistent ground units in the form of checkpoints, FOBs even outside the absolutely necessary mission scope would breathe more life into the world
I hope that the bugs described in other threads will get fixed (mostly depending on fixes provided by ED). There are still some details to be added to make the campaign a more enjoyable experience placed in a vivid environment.