The match is the purpose of training.
The training sessions, training programs, warm-up, drills, soccer skills, technical, tactical, physical, gaming, football drills, soccerdrills...
Everything is done for a specific purpose: to be successful in the match.
It is therefore imperative to propose at the end of training games. Either free or respecting the working theme.
No theme to follow.
The soccer coach can ask the players to respect the principles of games covered at the coaching session but not overemphasize it.
Give total freedom to the players in this part of the training session.