+1What I'd REALLY like to see is achievements for non-ironman games.
Removing ironman requirement for achievements would mean you could cheat to get them, effectively making them meaningless.
What I would like is multiplayer achievements. Not to make the current achievements be doable in multiplayer, but additional, multiplayer only achievements to be added. For example:
More Than Just Friends - Have a royal marriage with another human player.
Bad Manners - Annex a human player.
Frenemies: Decline a Call to Arms from a human player against another human player, and join the war on the other human player's side.
Napoleon Reborn: Win a war against the alliance of all the other (more than one) human players in the game.
World Police: Enforce peace between two human players.
I warned you, bro!: Warn another human player against going to war, and then fight him when he does it anyway.
Got your back: Guarantee and then defend another human player in a war.
Comp Stomp: Win a war with at least two other human players against AI.
The Impious Alliance: Playing a Christian nation, ally a human playing Muslim nation and together fight a war against another Christian nation player.
Concert of Europe: Have the entirety of Europe be controlled by human players or their vassals/PUs.
Bulls of Donation: Have the entirety of the Americas be divided amongst human players (meaning no AI colonies/native states, existence of uncolonized provinces is okay).
Scramble for Africa: Have the entirety of Africa be divided amongst human players.
The Great War: Fight in a war with at least three human players on each side.