20 teams per league means either a longer season or more matches per day.
More matches per day was given the thumbs down by those of us that took the survey and Nordeus won't want a longer season as 28 days makes perfect business sense.
I do think though that once a certain level has been reached a different league format should be adopted. After 26 or 39 seasons (2/3) calendar years Nordeus should be able to identify those teams still being managed and those that are abandoned. Separate them and introduce relegation.