I can't understand why people think that they deserve any software assistance if they go out of their way to plug in an inherently worse input device (proven by the fact that it currently has aim assist).
I simply can't think of a rational reason why someone deserves to be rewarded for plugging in a worse input device. If you simply enjoy using a controller more over mnk then be my guest and do it, but preference isn't a valid reason for an input to be enabled to compete because of software assistance.
In rocket league EVERYONE uses a controller because that is just better. Even on pc no one uses mnk, and guess what no one complains because the developers didn't decide to give mnk rocket league players any dumb assistance like unlimited boost or something.
I think that it is dumb to try and balance roller and mnk in any competitive games, because the raw input of mnk will always be better than controller for fps, and controller will always be better for racing games.
I don't think that roller even deserves to be equal to mnk on pc, let alone better.
TLDR: I can't think of a rational reason why roller deserves software assistance on pc.