Just make ypur soldiers do PT without them. Then they use them deployed.
Heavy artillery makes your M4 seem dinky and useless but soldiers aren’t dependent on howitzers.
The proper doctrine for these kinds of devices is to enable people to do things that’d be impossible otherwise. It’d maybe be life threatening to force a guy to carry a 175lb pack 25 miles in a day. But may be entirely doable with these kinds of exoskeletons.