there seems to plenty of armour but not much power. In a lot of the pictures the soldier seems to be carrying the weight himself. There should be some suggestion of how the suit provides assistance e.g. external pistons on the limbs. The suit would need a hefty power source and ammo storage.
Here are my idle thoughts about PA, I'd put some of that machinery in front and behind the torso, to protect the wearer and to keep the body narrow enough that the arms can move. I'd put a missile tube on one side at the back which would rest vertically and swivel over the shoulder to fire. In this picture there is fixed armour around the head with an opening (a sliding plate could seal it) and a close fitting helmet worn underneath, I did a view slit rather than eyeholes because I imagine there would need to be some space in front of the face for head up displays. The little lump on top is a pair of cameras to view the world with the face shield up.
If the suit is going to carry the weight of the weapons there is no need to hold them by a handle, if the weapon is attached to the arm the hand could be free to operate a key pad to control the suits functions, comms etc (that's supposed to be a key pad in his hand). I'm not suggesting that much detail be on the figure but the hand needn't hold the weapon. The armour around the hand would give some protection while still enabling dexterity. I have no idea how to model the ammo feeds to the magazine at the back. I'd have lots of little cameras so the pilot can see what the gun is pointing at.
If you are going to take huge rocket powered leaps you don't want to take the impact of landing into your feet so I'd say the feet would be thick, maybe hooves or separate ball and heel, with the human foot inside the suits leg, making the suit somewhat taller than a human.