Well, for the first time since the langauge was created you can now do `brew install clojure`, and then `clj` on the commandline and get a repl. I would have loved something that painless when I was learning Clojure.
Sorry but this whole conversation is a stretch. Anyone who looks into Clojure finds out about Leiningen. The official clojure.org even mentions it. No it's more than a stretch, it's rationalizing.
Previously, there was no brew formula for clojure and there was a hardcoded pointer to leiningen. When the clojure formula was added, that was removed.
Installing leiningen is not trivial on all platforms (Eg: Windows).Even on Linux distro repos may contain older versions of leiningen that subtly break things. Perhaps it would be better if leiningen is part of closure distribution rather than existing as separate entity.