For voice chat, it's hard to reach. And for lean left and right. I think we could replace the cliched "Q" and "E" for leaning left and right by hold "A" then "D" to lean left and hold "D" then "A" to lean right.

Ex: While holding down "D" to moving to the right, hold "A" to lean to it's direction (right) then release "A" to continue moving to the right.