Just saves using up the whole runway to help ATC.
Landing on the right spot will achieve just that. I don't believe you need to do anything else than the right thing. In my case, if I have to use the whole runway to stop in a safe and controlled manner then be it. The last of my worries is how much time I "think" I can save to others established during a less critical phase of flight than a landing at LCY. How would I know for sure unless I am the ATCO planning the runway occupation sequence ?
Interesting video though.