Here is a request that does not involve new planes.....
Is there any way to add a new 'Difficulty' option that allows External views
Only while on the ground?
It may seem an odd request but while I am happy playing 'Full Real' I often find myself joining an unfamiliar map and having no idea where my spawn point is in relation to the runway (or runways) From the cockpit it is impossible to see where I should be going and more than once I have taxied to the wrong end and found myself taking off in the wrong direction and meeting someone coming the other way. On one recent occasion I could not find the runway at all so just took off where I was and discovered I had just taken off across a grass field. On another recent occassion I decided it must be a grass strip and tried to take off and just ripped off my undercarriage because I should have used the levelled grass runway I had failed to find
I don't think anyone would get any unfair advantage from external view while on the ground and in real-life no pilot would be taxiing out while unaware of the airfield layout.
If you are worried about people taxiing while in external view because they are not skilled enough to do it from the cockpit then restrict the external view to only work when the speed is zero.