In a Multi crew environment we MUST use standard phrases and procedures for safety and to ensure everything is done correctly. One action signals another to begin. SOPs also allow it to be much easier to detect any abnormality. This concept is no different to radio procedures.
In short, follow the procedures, THEN revert to plain English if the message isn't coming across. Concise procedures may not seem a big deal but remember we all share the same airspace, no matter what you fly. An extra 15 seconds transmitting unnecessary calls can mean 1.0nm travelled for some.