The latest develop branch now has sayid debugger and clj-refactor as optional features, which are not included by default. This should make running the Clojure REPL a little lighter on resources. If you want to have these features on by default, its a simple change to the Clojure layer in the .spacemacs file. Rather than just clojure, add variables for each of the features you wish to enable (`t` for true)

(clojure :variables
         clojure-enable-sayid t
         clojure-enable-clj-refactor t)