For some (myself) the right shift key is the main shift key; so doing away with it would be terrible. Typically holding it down with the right pinky while typing full speed ahead, as well as single movement stroke patterns for <>{}?"+_ and so on, so heavy on all caps C snake case type use (if that makes sense.)
I also use the right shift a lot (though it's not my "main" one) and would hate to see it go away.
But there's no reason for it to be so freaking huge! On the two keyboards I have on my desk (HP EliteBook laptop and a "normal layout" desktop keyboard) the right shift is the second-biggest key after the space bar!
