I have seen some of these games and agree with you in the point, that the gameplay was better than in the regular games. Also the fields could be easily changed. But there are also points on the other side:
The field would get even smaller.
Last year nobody was prepared for a game like this. Because a robot is allowed to move in the penalty area partly, with some programming a goalie could defense the goal 5cm or 10cm forward nearly as it was before.
The size of the penalty area should be changed. In the current situation a robot does not really fit between the penalty area and the regular white line on the left or right.