not as heavy as heavy armor
One thing that bugs me about marines, and severely inhibits their performance, is that they all have the same amount of health, and that health is rather low.
This is a problem because it means aliens tend to kill marines really easily, even with level 3 armor upgrades. Also what with exosuits beiing a tier 3 upgrade and presumably extremely powerful, most marines really aren't going to have an option to boost their health, either due to exos being unavailable for most of the game, or because of them being very expensive, or because of them being too much of a game ender.
Point is, I kinda don't like that the only way to really be at all survivable as a marine is to hide behind other marines, they kinda rely too heavily on the rain of bodies approach.
So, It'd be quite nice if you could buy a health upgrade, in the form of a medium armor suit.
It'd be a fairly early upgrade, and would add say, 30 armor on at armor level 1. At armor 2 it would add 40, and armor 3 would add 50, which means an armor 3 marine with medium armor would have 120 armor as opposed to 70 (I think?).
As a tradeoff, you can't use it with a jetpack, and your sprint speed would be reduced, not completely removed, but reduced a noticeable amount. It should also cost about 10 res, not too expensive, but also not free. A good thing to buy certainly, but you would have better options later on, and at the start it might not be the most cost effective choice. With an armor upgrade or two though and before you get jetpacks it could be a very useful upgrade for the team, especially for marines with little money available, as it would significantly increase their survivability and let them serve the important role of meat shield for the rest of the team more effectively.
It also means you have a way to make marines better, without going further into the call of duty zone, with everything being incredibly high damage and people dying instantly, I don't really like that in games. NS has a lot of damage in it already, it could use some more health.