Well- it's sandbox-y in a lot of ways, in that the world is very big and definitely not uniform, both in terms of what is going on and also the scale of what's going on.
For example the Northern Continent is just about in complete disarray. The Fractured Lands, The Axelands and the Battlegrounds all used to be the largest, most prosperous nation the world had ever known, the Kingdom of Damask.
But civil war and a foreign influx of humanoids and humans have turned the area into complete chaos. The King's bastard brother technically sits on the throne (him assassinating the royal family was what lit the fuse on the whole thing exploding) but in reality, the place is a hodge podge of robber baronies, rapacious humanoids and greedy, amoral dwarves.
But if the players aren't into that, or get tired of that, a quick boat trip south across the Turbulent Sea will land them in a much more stable place, especially if they don't mind signing on with the Great Khan of the Endless Plains, who just about has conquered the entirety of the southern continent.
If they want to serve one of the minor powers NOT ruled by the Khan (yet), things will be dicier, but still not a daily struggle to survive like they face in the north.
Or they could head to the Canterbury Isles, where demi-humans outnumber humans and a possible race war between the demi-humans and the followers of the "humans first" god Therran the White is "all" they would have to worry about.
Or they could strike out for the unknown and find out if there really IS a white man living with the hostile natives of the Trackless Jungle.
Or outfit a mighty ship and try to gain an audience with the Shogun of the Droplet Isles.
In short, one of my main goals was not to make Dragonlance, where no matter which direction the PCs head, they're in a world where steel is scarce, clerical magic is unknown and dragon-dudes are roaming the land.
Ariakus is a big world with a lot of variety, giving the game master support enough so that the PCs picking up and heading east to see what Utgaror, a nation ruled by giants, is like.
And you can see what I'm talking about a little better here: I have posted the complete map at my blog.