Well it has already been reduced in its effectiveness. I believe a couple seasons ago they made GS training less effective to help with this issue. Not sure how much less effective it is since the change has been made but my only two opinions are:
Keep it There or Remove it.
I personally would want to see it removed, but I can understand why it is in the game as there are instances where I would want to train it. It's just a problem because the majority of teams in top leagues train GS nearly every week. This was brought up in the B3 Thread where a couple managers were saying how it is impossible to win B3 without training GS throughout the tournament, which I agree with. I personally think BB should remove it and see which managers can truly manage minutes, or just leave it as it is, as it has already been reduced in its effectiveness.
Murray/Harris/MPJ/Grant/Jokic - 2020 NBA Champs