I am really going to throw a wrench into it. I would like both. The current system for strategic air war and HOI 3 style tactical air. Let me pinpoint my tactical bombers and naval bombers etc...
In my opinion this would be a nice way.
Let the system with air-regions be in place for fighter missions. ("Interception-zone")
The same is ok for torpedo bombers. They can use the same area as ships for theyr bombing runs.
But give at least tactical and for gods sake Strategical Bombers the option to bomb one specific territory.
Not only because of Bombing Ground troops there but much more important in my eyes is the bombing of Factorys and Supply routes.
(And i can draw a line here to HoI3 again)
It was essential to bomb the logistics and Infrastructure behind the enemy lines to cut them off from Supply and be able to take them on even if your units are not as strong as theyrs. This possibility made this game many times more strategic and makes you think HOW MANY Units you let actually run around. When bombers are only deployed to "bomb around" in a wide area they lose most of theyr effectiveness and it gets more a game of "who uses more" instead of "how to use your units" it takes so much strategic planning out of the game. And that is a sad thing in the end.
Ye I know Paradox wanted to make the game more "user friendly" and simpler... (and thats somethin horrible for ME in the end, because i love complex games and I think it could get even more complicated than HoI3 for my liking, as long as the Interface gets more accessable)
But breaking down the Air Mechanics to such a big simplification is to much. Its ok for Fighters to gain Air Superiority or intercept in a specific area. But any kind of bombing loses its sense. You want to bomb Key positions or Critical Areas.
But (and I must say that i actually give a damn about things like "it needs to be authentic" or things like that, as long as the play has freedom and the game is fun) to draw the line to reality now, no one would send its bombers to go around and send some little crackers here and there. This is way to expensive to just waste bombs (and Bombers) everywhere.
So as a summary again:
I think this mechanic is nice for Fighters, but to simple for bombers because the game loses to many strategical aspekts and shrinks your posibilitys as a player to much.