As many posts suggest, people feel it is a bit over powered. I tend to agree, as soon as you put it on you are invicible. So a couple of ideas came to mind ~
1. Instead of the helmet providing constant life via EU. Give food a purpose again and allow it to have a built in food storage. The idea is compressible food in containers, that can be injected in to the helmet via the canner, that will slowly keep the players food need met when worn. Kind of like the Fuels in IC2 currently. As for the EU charge it currently needs, this could be used toward the extraction of food to feed the player.
2. Armor degredation. All this power has to have a flaw. Let the armor degrade over time and have the need to be repaired via more iridium. The more degredation, the more iridium needed to fix it.
If anything has been suggested before I am sorry. I did a glance over the posts and had not seen anything like this.