I've always wanted to make something similar to this, and now after much experimentation I think I've reached a decent product. Unfortunately this mod sacrifices the use of your grab, but in return you get the ability to use an upgraded Maximum Charge without having to use up a skill slot! I plan to update this mod to add all races, as well as adding a new input for the charge so that it wont replace the grab move.
To charge, it is the same input as doing a grab, left bumper + B.
Currently only for Saiyan Males and Saiyan Females, more races coming soon! (Because I am kind of lazy lol)
Drag the data folder included in the mod into your XV2 modding directory. (May not be compatible with some other mods)
v1 - Release!