Its still a young project. I agree that its currently suboptimal, but the source is one github (along with the abadnoned enfer, which looked really nice but appears to have been abandoned).

I definitely think Clojure has a future in big data - the repl, immutability and the strong links to the Java ecosystem make it an obvious choice for developing interactive (in so far as this is possible) big data applications.

Also, it's fun to code, which should never be discounted as a reason for a language to succeed.