The point of using one of these new technologies such as the multiple mouse ball controller, dual flight stick, camera, and/or free moving gyration is to simplify gaming. With any of these technologies one nolonger has to worry about having to use all the buttons, dpad, and joysticks to play a game. Many games would nolonger require nothing more than an analog stick and a jump button because the camera work would be controlled by your arm instead of your thumb.
You will now be able to aim with both hands independtly or together (one hand controlling camera view while another controls aiming).
For example you would be able to move Samus forward/back and strafe left/right with one joystick while you control the camera with your left hand. You would aim with your right hand. You could aim, look, and move all at once. Then you use the face buttons for other functions like jumping, missles, ball, etc. The right trigger would be used for firing and the mouse wheels used for switching weapons or visors. The left trigger would be used for the grappling beam. When you activate the grappling beam your aiming becomes soley controlled by your right arm (you could just use the right arm the whole time for camera and aiming but when they are seperated it gives you two cross hairs like a riffle to line up creating a much better aiming system than just the right arm alone). I would make the grappling beam attach to any object/ledge/enemy so it is something that can be used all of the time. You could throw something at an enemy with it or throw an enemy. You could use it to grab powerups instead of using the arm cannon's charge to pull in powerups. Of course if you hold the left trigger with the double click (just like you can charge your arm cannon) the grappling beam will take you to object you have grabbed granted the object will hold your outrageous weight.
Also don't forget that I mentioned taking the dpad away for good and replacing it with another set of face buttons. With this setup you would still have four face buttons free and an analog stick to do whatever you wanted. For example both analog sticks could control the movement of Samus just the same so you could switch sides easily to access the second set of face buttons without loosing any functions at all. Both sides for example could have a jump button, but one side has functions like; punch, kick, and flip. The other side could have jump, map, ball, and missles.