The game looks interesting, & the mods released for it might be great, but unfortunately Paradox in its wisdom decided to block non owners of game looking at mod forums on their later releases. Seems self defeating to me, as I gain a lot of knowledge about a game by looking at the mods available for it..
I also was never happy about blocking users looking at the mod forums.
For March of the Eagles, there are now two versions of the 1792 mod. The original and a new one where we added historical forces (and a reworked combat system - one of my ideas). Much research (I only did the coding not the research) even down to putting in ever ship of the period with it's proper name. Admittedly, not all frigates are in, and I refused to put in ships smaller than frigates (which we lacked accurate data on anyway). The armies make the assumption that all units are at full strength (which they historically weren't, but we can't find out exactly how understrength particular regiments were in 1792). That there was good data for even the Turks was a surprise to me.
More recently I added a "for fun" mod. Europe broken up into smaller nations.
My multiplayer group uses this one to just roll dice, pick a nation, and fight it out. Not facing off the terror that is France as in the regular game.
Much effort also went into fixing up the naval war (in the 1792 mod), and some other bugs that mods could fix. One bug I could never fix was occassionly having zero strength armies occur - only seems to happen when regiments are excessivly wiped out (possibly causing a -ve number to occur ? Don't know. But the game does not check for zero strength forces so this can occur).
There is also recently announced 1848 mod in development.
But overall, little activity compared to titles Paradox is supporting better.