Now without the info I am little leery of the solution not for the reason some might think.
There has been a definite hit in player numbers and activity do the AH2 switch over. If you use the current stats page to compare countries .. you can argue over many things but the levels of deaths and kills per country is roughly back where was back in Sept/Oct. 2002.
We have lost a lot of people. Or a lot of people are not flying as much. And that goes for more than the MA .. the events in the SEA are definitely also down on numbers (by about 22%-30% in Squad Ops over what they were).
As already brought up what you have to figure out here is how likely is a person to change countries, wait to fly for his country (for those who are dedicated to a country), or log. You have to come up with a time limit that will not encourage more people to log off than wait. I don't think you will encourage many people at all (not the dedicated squads) to switch countries and abandon their fellows or squads mates just to be able to fly with no time limit.
Therefore if you do put this in place you need to put something in that strikes the right balance. If you do 15 minutes you might be causing a lot of people to log. Once you start encouraging your customer base not to fly play you start making them look for others things to do.
5 Minutes might be better .. a penalty and enough a delay to help the defenders regroup and prepare for the next wave but not enough to cause people to log instead of flying.
I personally don't and haven't bought into the beliefe the massive amounts of people switch between countries on a regular basis.
I took a day to try to check country affiliation and squad information back 7/26/04 and this is how things stood then.
So did some research:
http://www.dgideon.org/aceshigh/master-list-of-squads.xls There are 491 registered squads of which 341 are actively flying in Camp 54. Of these squads there are two types of squads .. dedicated who only fly for their country and primary who mainly fly for one country but also fly a bit for other countries. Here is the break down of the squads:
82 - Bishop Dedicated - 24.0%
8 - Bishop Primary - 2.3%
96 - Knight Dedicated - 28.2%
16 - Knights Primary - 4.7%
91 - Rook Dedicated - 26.7%
31 - Rook Primary - 9.1%
As you see there are 269 squads that fly just for one country and don't fly at all for any other country; That is 78.9%.
Only 55 squads have pilots who will fly more than one country during a camp and even then those squads tend to fly more than 50% of the time for just one country. So this idea would nudge these squads. But the effect on the others is going to come down to wait or log.
Now the next interesting thing is the possible pilot pool that a country can field from these squads. These are the pilot numbers of the squads that could fly (does not reflect the amount they fly or frequency).
970 - Bishop Dedicated - 25.0%
86 - Bishop Primary - 2.2%
1040 - Knight Dedicated - 26.8%
199 - Knights Primary - 5.1%
1195 - Rook Dedicated - 30.8%
390 - Rook Primary - 10.1%
3205 pilots only fly for one country out of 3880 .. or 82.6%. Meaning as much as people here post and discuss actually the majority of pilots of all countries fly just for their country. But do note, currently have no way of tracking pilots not in squads.
So once again I don't think any programming solution at all is going to cause a mass change and cause people to start switching countries just to fly with no delay since most are dedicated to flying with their squad and their buds, and some to a country. It will cause more of the primaries squads to switch and cause some dedicated squads to move into the category of primary. But I don't see a mass conversions.
So that leaves the option to wait or log. As I said its all going to come down to the amount of the wait. Too much and people log and you start training your customer base not to play your game and go else where. Coupled with lower perk point costs for certain planes and this could have interesting and unforseen consequences.
To short and their is no impact to blunt the edge of overwhelming numbers.
Very tough rope to walk.