What’s the difference between a save and an epic save

There is no reason for bots to actually do that since they're specifically designed to play along with you. So a bot sitting in the goal box and not going after the nearby ball is definitely a hangup in the bot's path logic or something related to that.

It's very likely that Psyonix's AI update set some things back. This happens to pretty much everyone designing AI because there are so many factors that go into intelligent play.

In doubles, I find a good tactic is to designate positions, switching up when necessary (communication is key here).

Offense

Midfielder should stay centered, keep a well-plenished boost, and keep watch for the pass on a clear shot. Keeping the ball in play and be able to speed back to defend if needed.

Striker should be chasing the ball, taking shots, and setting up passes to the midfielder.

Defense

Goalie should be focusing primarily on the save and only clearing if able to do so without losing position.

Defender should be keeping the ball in the corners to keep the ball at a bad angle, and clearing the ball when possible.

First Touch

Communicate if you are going to be Goalie or Striker. Both going for the ball can lead to an easy goal against.