What I'd really like to see is more Milsim events that are operated as "team versus team", where Milsim teams can ...dare I say it....compete against one another. No more "JTF vs the US Rangers in the Arctic Circle, fighting for control of Canada's polar bears", but rather Team X operating on their home field and defending it from Team Y, with a "territorial record" kept of who has "conquered" which areas....this only a very small part of the idea. It could go on indefinetely, until all "contested areas" are either won or lost. You never lose the use of your fields of course, it's just a method of "scoring". "Owning" more territory could permit you to field more troops, etc. Just an idea of course...and it doesnt have to necesarily be limited to the organised milsim teams. Red VS Blue as it were, with each side consisting of a coalition of teams and or individuals.
Sounds a lot like "Risk". I love it. Honestly, that's a great idea albeit a massive undertaking.