Why would you design a system to basically give you a punch to the gut/make it worse for not getting the position you want?
I want to continuously climb the ladder when I win, not get a tiny amount of LP gain for a win because RNG made me not play the role I'm highest rank with. It makes it feel like a waste of effort and time.
*You won when not playing your dominant role? Here, take only 1/6th of your usual earning.*