There is a general demand for a fast and easy to use String formatter. As seen here, and e.g. https://github.com/google/guava/issues/1389 etc.: http://stackoverflow.com/questions/29747912/can-i-precompile-the-format-string-in-string-format/
Now, as the SO question seems to suggest, slf4j is one of the best out there regarding string formatting. The syntax is well known and widely used - the MessageFormatter simply could use more love around his API. A var-args format() method instead of arrayFormat() would be a good enough start.