Boudicca's leaderhead has been updated (the main change is the hair).
There is now music (uses England's music).
The shrine to Andraste no longer shows a red exclamation mark (though I've been unable to get the shrine itself to show up yet).
The citizens' names are now showing.
The Celtic Warrior can now be bought with faith and ignores forest terrain.
The Iceni civ icon has been improved.
The background is now more in line with Firaxis backgrounds.