I totally agree with the OP, armor abilities are one of the many things that made Reach trail in the dust of how fun and well made H3 was.
-Armor lock is too good to be spawned with and repeatedly used.
-Drop shield is too good to be spawned with and repeatedly used.
-Jet-packs are too good to be spawned with and repeatedly used.
-Camo is nerfed to the point of unusability... let us pick up good camo instead of spawning with garbage camo.
-Sprint should have just been a default ability rather than something you have to choose.
-Evade is same as sprint; it should be a default ability for Elites.
-Hologram is the sole AA that is perfectly balanced and fine.
So please, 343, don't eff this up. Returning to the time-tested, well balanced system in which abilities have to be picked up rather than spawned with will save Halo 4's MP from the horror that was Reach.