Actually, I think the stats page should stay with some modification:
Ideally, I think it should reflect your over-all intelligence estimates of the forces of other nations.
Now, how to achieve this?
Well, the 'best' solution would be to have it tied to a number of factors:
1. Your relations with the country concerned. Your allies would be more forthcoming than your enemies, one would think!
2. The 'geo-political' relationship with the country concerned. For example, USSR would spend more time keeping an eye on the military preparedness of Germany and Japan than the USA as the former represented more of a direct threat to the USSR.
3. Your intelligence tech relative to the country concerned. i.e. encryption and decryption techs. For instance, if you have a higher level of encryption than another country's decryption then they would get a penalty in making estimates of your preparedness.
4. Your political sliders. A closed dictatorship naturally makes it harder to gather intelligence within it than an open democracy.
5. The type of unit about which the info is being reported. It's kind of difficult to hide a battleship, and not too difficult to count them all, but the same is certainly NOT true about infantry divs.
So, looking at all these, what would be best is if the screen presented the information as it does now, but the TRUE data gets modified according to a combined effect from those factors above and it is the MODIFIED data you see. Note that this could result in both over/underestimation of the true data. I think that is more realistic than blanking it out as all countries keep estimates of other countries' military capabilities.
I don't know if this is at all possible from a mod point of view. Obviously it would be possible to come up with a list of factors which generate a total +/- % accuracy and then apply those to the data, but the questions are
a) can the data be sourced then modified before being presented in the screen, and
b) can you mod the system so it presents the altered data in the table.
With this system you'd have further reason to chase the cryptography techs, and the stats page would become a sensible part of the information available to your government.
Comments, anyone?