It's an example, the roster of a bot team, you know.I like your idea of replacing these teams to make the matches meaningful. But a 3 or 4 star teams with players in correct position is likely stronger and more stable. This may not be fair to the teams which need to face them.
Full of 3* players and a couple of 4-5*.
An active, 35T manager can have (at least the started 11)a team of 4* players and with good coaching can win those teams.
An abandoned team will cause the same problems to every level.Just one word relegation.
My proposal is replacing by a bot team and freezing till the manager would be active again.