If one wants to succeed in this game, one has to take care about ones team on a more or less daily basis.
For a month, two, three, even four that's OK, but after a while...
Now the second thing is, that, if you want to succeed in this game, you need to invest (token=money).

Now if you, a manager of a good level 7/8/9 or higher, decide to make a break, leave the team for a month or two, you basically have to accept, that you looses major investments. Returning after two month will mean, that your team is overaged, propably not playing in the CL, maybe even has not made it to the next level.

Who - under that conditions - will come back and start to invest again lots of token to get his team compatitive again.

SUGGESTION: Give players to chance to pause.

This could work like this:

After 3 month consecutive playing, the manager get's the chance to freeze his team for a month.
Freezing a team has to be announced lastest on the last day of the season (or a day before if necessary).
Freezing is not free. Freezing cost a certain amount per season (e.g. 28 token).

Freezing means, that players age and capabilities remain unchanged for 1 season.
After returning, which the player has to announce on the last day of the season before (or a day earlier if necessary)
his team will be the same as before and will be placed in the league where it would have got to without freezing.

At the end of the frozen season the player has the chance to freeze the team again by paying the mentioned amount. (freezing is possible max. e.g. 3 times in a row).
After lastest 3 month break the manager has to play again for at least 2 or 3 consecutive monthes before he is allowed to freeze again.
If the manager does not return after the 3rd frozen season, the team starts to play unmanaged (as it does now).

The advantage of such a possibility would be, that a lot of players would remain with the game for a much longer time as they are doing now.
As the managers have to pay for getting their team frozen, they certainly, at least in most cases, will be back for some seasons.

A possibility like that would make sense to all -
Nordeus gets some token for freezing and does not loose a lot of players
players who have the chance to get the break they deserve after monthes of intensive play.