There's no balkanisation between CL, Scheme, and Clojure, they're different languages stemming from a common tradition and thus have a simmilar syntax. That's like saying C-like languages should converge, there's no reason for C(++), Java, and Rust to all exist at once.
The balkanisation is between implementations, which is a strength in as many ways as it is annoying. At least in CL's case SBCL is more or less the standard on x86.
