Plenty of games use multiple drastically different control systems, and this one would hardly be drastically different.
I thing I do think is important is opening up other options.
By mapping the face buttons as the "premeditated" shot types (again, like sticky keys, you press them during the ball and they stay on unless pressed again) you not only open up the option for more types, but a way of adding in the other modifiers to go with them. For example:
A: Unorthodox Shots
B: Advance down the pitch
X: T20 slogs
Y: Switch hit shots
With the addition of modifier options, for example press A then use the triggers, you could have slog sweeps and such. Those kind of options are very much future version kind of things though.
Mapping the current ones to the facebuttons though have the advantage of opening up those shoulder buttons. I would like to have the LB as a leave button, as it would be so much more nature to use. Having the other for the emergency block would also be nice, but again, that's more of a future version suggestion.
Who knows though, I kind of just want more options.