Armour is fine as it is, the only problem is that you're lit up like a Christmas tree while using it, so you end up taking more damage than normal. I'm fine with that, and don't use cloak nearly as much as I used to; but that's just me, some guys prefer to moan on the internet.
I just took marshall + mobility enhance while cloaking all the time and rushing everyone i see. Oh, 20/5 ! Considering the fact that is was the first time I used this technique, guess what... Stealth>Armor! \o/