Mouse sensitivity options per game

I like to play with a high sensitivity in Reach but I like low sensitivity in Halo 2 and 3 for better BR and snipe accuracy, and it’s annoying having to quickly change sensitivities at the beginning of matches so I can play how I want. Controller users have an option to change their joystick sensitivity per game, but M+KB users are limited to having a mouse sensitivity slider for all of the MCC games, instead there should be a mouse sensitivity slider for each game individually similar to how the joystick sensitivity slider is.