One of my problems with the In-game scoreboard is you can’t view it while moving at the same time. As soon as you activate the scoreboard, your character will lose the ability to move. It was easier to check it while moving, and have this feature put in as a community request.
When looking further on halocouncil.com, I saw many posts that complain of not letting you look at the scoreboard when moving. A good list is here.
We would all really like this option back.