Hi,I'm level a 16 level manager for this season (season 18).
I passed my first 4 levels (4 seasons) with my initial team,but I passed level 4 only at 5 place.
I tanked level 5 for 2 season (10 and 9 place,behind only to bot-robot teams),because my team was getting retired and players had no more motivation.So i started changing my team structure, and I obtained a 3 place,a 2 place and 9 first places in my last 11 seasons (11 promotions in row).
Quality level gap is not so clear from level 1 to 3,some problems might occur in level 4,from level 5 you should care if the decrease of stars for a player is followed by a decrease of performance in the new season...