To add to what
Barthheart said, the AI is also supposed to be good (not surprising when the game is designed by Soren Johnson). In addition, his team has added a ton of content in the last year, such as 500 (or so?) new events, to name one example.
Is this any good? I mean, particularly good? I don't generally reward devs who take the Epic bribe but as I recall there was massive buzz over Old World.
FWIW, my understanding is that, had it not been for Epic's money, Old World might not even have gotten made. The game's previous publishers went belly-up, leaving Mohawk Games suddenly & desperately needing cash to finish development.
So at least in this instance, I can hardly fault Soren & co. for taking the money in exchange for being an Epic exclusive for a year. It was that, or nothing.