An idea of an LSP/Calva editor action: when full namespace name is used in the code, introduce an alias and use it for all such places (or use an existing one). Example:

(ns a
  (:require [clojure.walk])

(clojure.walk/walk identity identity {:a 1})
(clojure.walk/walk identity identity {:b 2})

(ns a
  (:require [clojure.walk :as walk]))

(walk/walk identity identity {:a 1})
(walk/walk identity identity {:b 2})