Complex sentence: On behalf of "Manawatu Standard", a reviewer complimented on the EP's production, songwriting and "the right edge to appeal to a mainstream audience", saying the EP was "(what) a good pop debut should be".
Split into simpler sentences: On behalf of "Manawatu Standard", a reviewer complimented on the EP's production, songwriting and "the right edge to appeal to a mainstream audience". He further labelled the project as "(what) a good pop debut should be".