It is nice in a way they make sure you have enough
Hey Cat, I don't think that it's a very good idea. With that, many abandoned/ghost teams continue playing and spoiling the leagues - some teams won them 10-0, other get a 3-0 cause the ghost team has injuries or cards.
Another thing is that if playing with such a team, usually they cripple my players.
I think if a team is inactive should be stay in the fridge till the manager shows again that he is active.
Better to fill with bot teams. At least they are playing with right formations and some time a descent football.