I quite liked March of the Eagles.
However, given the game's scope, and its overall purview and ambition, I felt that it fell somewhat short of what it could have been. I wanted to immerse myself into the time of Napoleon, and instead I had a truncated experience of a grander Paradox game.
Some aspects worked exceptionally well (I very much liked how losing nations earned more points for unlocking perks/talents), while others didn't make sense (of course I would take out loans/spend too much/etc).
Overall, the game was good, but its gameplay concepts were squashed a little too brutally into the Paradox map/gameplay style. I think the time period offers a lot, and the possibilities are there, but alas it wasn't sufficiently fleshed out.
I don't regret buying it, but it wasn't what I wanted. Here's to the next iteration!