Southpaw controller options

Being a southpaw player the halo games have been a god send when it comes to control options, but with the addition of new abilities the control options are becoming a little stretched, as it stands the only control scheme I find comfortable is southpaw sticks with bumper jumper buttons. Unfortunately this means that to use sprint or dash/boost I need to place my left thumb on the right thumb stick and use my right thumb to press either A or X, this is incredibly frustrating as I tend to die a lot. What I have noticed is that the up and down on the D-pad is currently not in use, would it not be possible to use the down D-pad press as sprint and the up D-pad press as boost/dash. This would make the game much easier for people who use southpaw and bumper jumper to use the full range of abilities. I’m not saying move the button functions from the buttons to the D-pad I’m asking if they could be used in conjunction with the buttons to make life easier for us who use alternative thumb stick control options. Please 343 if you read this it would be a god send.