No.
Terrible, TERRIBLE idea. There will ALWAYS be one piece of armor that is superior to every other piece of armor in that specific section leading to Halo 4 turning into attack of the clones and every noob who uses armor bonuses as a crutch, and trust me, noobs outnumber casuals/hardcore gamers. It happens in nearly every game that includes armor bonuses/perks or whatever.
Everybody should be equal, this game should be based on skill and not what armor you wear. That's exactly what went wrong with Halo Reach. Half the game is based on what armor ability you choose.