One more suggestion: would it be possible to set individual planes to higher levels?
For example:
Make low settings set the planes to: 1. low 2. low 3. low 4. med 5 med. 6. high
medium setting so that planes are: 1. low 2. med 3. med 4. med 5 med. 6. high
High setting could then be like this: 1. low 2. med 3. high 4. high 5 high 6. high
This could turn out to feel more "realistic" as certain individual planes would stand out and could require actions taken against them. E.g. a quick kill rookie amongst aces or an ace amongst rookies.
Not sure if that makes sense
