I fear this. Sprint is bad and allows people to make terrible decisions in game and get away with it.
I'm hoping if it really is a wide spread feature on every spartan, that there is a way to turn off sprint entirely.
The flip side of that is that it speeds up the game. It forces faster decisions and better teamwork which adds a layer of skill. That very same person that makes a bad decision and tries to get away with it can get crapped on by a team of fast thinkers with good team work as they have the equal ability to push quickly. It's a wash in my mind. And if it is a wash, and it still speeds up the game, I'll take the faster game play.
That's not to say I don't currently like say MLG with no sprint... I'm just very open about sprint being a default option.
Based on Frankie's comments though, I'm pretty confident that there will be something for everyone when it comes to this type of thing. He has repeatedly said that those that prefer a more traditional Halo will still be happy.