My bias compels me to point out the other services get all the expensive gear because they need it more than Marines do. The Corps already has the answers to the problems the Army thinks an Iron Man type of body armor would solve.
For instance, the article states the armor would be fitted with sensors to monitor body temp, heart rate, and hydration levels. Marines do this through small unit leadership and something we call “drinking water.”
The exoskeleton is also expected to increase the strength of the soldier operating it. Judging by equipment we’ve received from the Army it seems they could use it. Marines often sling around multiple sets of gear which normally require a two soldier lift.