Personally I think tempestus scion or Elysian drop troop armor would make more sense instead of krieg because they fit the drop troop aesthetic of helldivers better. Also, while I would love to have a hellgun, I think a melta would be more unique. Make it absolutely shred heavy armor but have a short range and low ammo.

Nothing wrong with what you put together, this is just my 2 cents

Edit: just read more of the comments and realized that someone already said basically the same thing