Reducing the quantity of work an organisation undertakes before releasing to live and starting something new is a foundation stone of agile effectiveness.
It's the discipline that keeps work in progress low and risk well managed yet it's one of the things that most organisations struggle with. Culturally management teams may like big headline numbers and engineering teams squirm at the thought of reworking features only recently released.
Never the less "right sized" work items keep the drama low. However breaking a complex product road map down into tiny increments of releasable value requires practice, creativity and willing collaborators. It can often be the single skill that marks out a predictable delivery team.
Tony Heaps insights into splitting users stories here could literally move mountains - a tiny piece at a time.