The Recreational Sphere is a great addition to the game, good for Astroneer League or just kicking it around like normal soccer; however, I think many improvements could be made.
As an avid Rocket League player myself, ball cam is an essential part of the game. I think either adding a GUI to the ball with an option to enable ball cam, or some key binding to enable/disable ball cam would be a wonderful addition. A GUI may be necessary in this case, if there is more than one ball in the vicinity, the player would want to select the specific ball they want the camera to lock on.
Furthermore, if a group of people want to play soccer just by kicking it around, it's easy for someone to just pick the ball up and spoil the game. Again a ball GUI might be needed here, with an option to disable players from picking up the ball.
The physics of the ball could use a bit of tweaking. I'd like to see the ability to hit/kick the ball very far, this would provide for some very interesting gameplay. Also, I've noticed that when a player head-butts the sphere, it does not apply a lot of force to it. I'd like to see some aerial moves where the player has jetpacks, and is balancing the ball on their head while flying through the air. I don't think that is possible right now, since little to no force is applied upward on the ball when the player is underneath.