Jim: Don't know which version you tried, but I've been playing the free version (several years old), and would say it's already rich in content. I've only finished the main questline once, and never felt like I was lacking places to go and things to do. Currently favoring water merchants with amphibianism, disintegration and 4x unstable genome.
The Steam version seems to feature some very nice additions. They're filling out empty locations such as The Six Day Stilt, and I'm glad to see them replace the "Ripe for the Conflagration" quest, which was an anticlimax after doing Bethesda Susa. I'll probably get it (even on Steam
) once I can spare ten bucks, although I think the plan is to make all content public further down the road. Only tiles will be reserved paying customers.