I noticed a change in the Abilities in Halo 4 from Halo Reach, for example Jetpack. Its range has been cut down in Halo 4. I remember that the Jetpack runs longer in Halo Reach than it does in Halo 4. So why make Jetpack worse in Halo 4 than in Halo Reach ??? One more thing though, before I go. Thruster Pack. Why, that is the biggest question. I see that it is fun, and if you fall from a great height (enough to kill you), you can use Thruster Pack to save your life (already tested it). Evade would have been a better option. Sprint, I think it works well in Halo, it is part of a Spartan, the ability to increase speed for short periods of time.
1 Because the jet pack was OP in Reach and lets face it, You stayed in the air for quite some time. Too much time.
2 Because Evade was also OP in Reach and Thruster like the shorter Jet pack range, Thruster is a balanced alternative.