My ideal updates would be:
First: Polishes out France and Germany, possibly adding troops. Bugfixes. A few maps.
Second: New faction (Russia?), further polishing on the first two factions if need be. Bugfixes. More maps.
Third: Either more polish, or another new faction (Austria?), bugfixes, maps.
Fourth: United Kingdom added, bugfixes, maps.
The reason there should be so many bugfixes is the likelihood that more features will be added as time goes on, and in mods like NaS, that often added some bugs that weren't caught before release. Also, maps can often have some minor (or major) design flaws, and in this mod particularly, it's important to work them out for maps.
These updates, obviously, should be spaced out quite a bit.