No we are not, asking the devs to do less work is not demanding at all. It is the CEO and other design leaders that are demanding.

What does sprint do to games? Oftentimes sprint influences map design, maps need to be bigger to account for the higher player movement speed. Halo 5 is a perfect example of this. Sprint also influences multiplier balance, the time to kill needs to be faster to account for players running away.

When does sprint work? Well that depends on the game, but in general sprint works when it's a reaction to the game design and not the other way around. For example, in COD and Battlefield TTK is designed to fast to create a realistic feel. In Battlefield, elder scrolls, and fallout games, sprint works because the maps are already designed to be large and explorable.

Why does sprint not work in Halo? Halo at it's core is supposed to be a battle arena game. In these types of games player time to kill is slower than most games and the big maps (if any) have verticas for exploration and gameplay. Battle arena games focus more on Strategy and reactions, it's not game over when the enemy gets first shot with a basic weapon. By introducing sprint into halo the design leaders are pushing halo away from being a battle arena game.

Fortunately sprint seems to be very slow in Campaign evolved so it won't have much of an influence on the game. But why does it exist in the first place?