A loss of 579 users from the user peak last week...Yikes!!
It's gonna be is what it is.
Just accept reality, this game will shrink for the next few months until it reaches a level of stability (my guess its will stop at around 12-15k users). As long as there is no way to retain new users, the downward trend will continue.
I think that my suggestion of putting new teams into the lowest bot league availiable, would really help. Instead of being gang raped every game, new users would get easy wins and sustain a high level of motivation while learning. Losing 10% of its manager population would not hurt nations like Spain, Italy, Poland or the US - in a smaller country with half full/no DIV II or DIV III its a desaster.
Maybe change micronation league structure to 1-1-2-4 or something like that - be creative once in a while and make it much easier for the noobs.
Größter Knecht aller Zeiten aka His Excellency aka President for Life aka Field Marshal Al Hadji aka Lord of All the Beasts of the Earth and Fishes of the Seas aka aka Conqueror of the Buzzerbeater Empire in Europe in General and Austria in Particular