I noticed that in RFCA, flag changes are possible under certain circumstances. Would it be hard to code in DoC or gobble up too much memory? I mean, it doesn't have to be comprehensive... also, aesthetically speaking, it would be nicer to just go for decals rather than actual flags I guess (Rhye made some for vanilla at least). But as decals are hard to come by, and modern flags are more common, I am not too sure it that will work out. Maybe modern flags could appear with the industrial era?
Examples.
1. Russia as the USSR could have the hammer-and-sickle in game; otherwise the Russian tricolore (with or without emblems) or the "Romanov flag" if dynastic and absolutist or totalitarian
2.the fleur-de-lis could change into a Napoleonic eagle (if that exists); otherwise the tricolore
3-China's dragon into different characters depending on the dynasty/the Kuomintang symbol/the PRC emblem etc. (although that wouldn't look too nice with the current colour-scheme) it would be hilarious to have the five-races flag though
http://en.wikipedia.org/wiki/Five_R...Flag_of_the_Republic_of_China_(1912-1928).svg
4. England's three lions could be replaced by the union flag, the commonwealth flag, or the chartist tricolore, depending on the civics and the passing of time
5. the Ottoman tughra could be replaced by the iconic star-and-crescent flag, if Turkey goes Republican
6. Germany/Prussia could at first have the original Prussian flag, and then change into black-white-red or black-red-gold, depending on the civics again. And under a certain civic combination a safe version of the flag from 1935-1945.
7. Austria depending on the lands it holds: black-red-gold (if Pan-German), red-white-red or black and gold (the Habsburg colours)
Maybe it could be tested as a modmod first.