Default routing engine was switched to Router::Boom. Router::Boom is faster than Router::Simple. We will dropped the Router::Simple as runtime deps. If you are using Router::Simple, please add it to your cpanfile. And so, Amon2::Web::Dispatcher::RouterSimple and Amon2::Web::Dispatcher::Lite will be remove from core dist at 2014. If you are using these modules, please add it to your cpanfile.