I mean, there are enough hard hit grounders already in the game that I don't see that should be a concern (i.e., not all grounders are weakly hit in the game). Besides, the game (to my knowledge) doesn't decides hit type based on clear categorization like pop-up, fly ball, line drive, grounder, chopper, etc. They are categorized as such *after the fact* based on how fast and which direction the batted ball goes based on the quality of contact made, so it's not like the game is doing "okay, it's time to generate a grounder, so which one among the grounder trajectories should I choose for this one..." type of thing. I think the game generates a ball trajectory from a wide and continuum spectrum of possible hit types already... so something like 100+ mph grounder I don't think is prevented from happening per se.