Simplify the following text for a Grade 13 native English-speaking person.
Original: The album featured a greater creative input from the quartet , although they still relied on a heavyweight production crew including Rodney Jerkins , Missy Elliott , Chad Elliot , and Dwayne Wiggins of Tony !
Simplified: The album featured a greater creative input from the group , although they still relied on a production crew including Rodney Jerkins , Missy Elliott , Chad Elliot , and Dwayne Wiggins of Tony !