A few more random thoughts.....
Once you have the "Volunteer" button and dice roll plane choice mechanisms in place, you can then adjust those weights in all kinds of interesting ways.
For instance, perhaps you not only take into effect plane diversity but also apply a modifier for the number of sorties that free-player has flown.
So maybe for his first 20 sorties his weights look like:
DR.I 70%
D7 20%
F2B 10%
Camel 10%
Now he has flown with training-wheels abit, sorties 20-50 might adjust to:
DR.I 30%
D7 20%
F2B 20%
Camel 30%
After sortie 50, he's had his training period. Now he's just playing for free. Thats OK, but he needs to start paying his way with some target diversity duty:
DR.I 5%
D7 15%
F2B 30%
Camel 50%
At this point he is providing targets in the form of lesser flown planes. However, he is still occationally thrown a bone 5% of the time to remind him of the benefits he would get converting to pay.
The possibilities are endless.
Also, if this mechanism proves successful, could it also not be applied to Early-War and Mid-War? AVA?
Is it a preferable mechanism to the 2-week trial?
Regards,
Wab