The first item in this set of franchise updates that could effectively impact your league the most is the ability to alter the structure of your league through dictating an exact amount of Mut 25 coins players for the dev traits (stars as well as superstars and the X-Factors) in your league. The new sliders that are available in league's settings can let you ensure that there's never more than a handful of elite athletes within the league at any time, which appears to be an ideal idea in the abstract.
But the effect of this be played out in a league that has 32 players will require a significant amount of experimentation to determine. The patch notes state that certain players are allowed to undergo regression in the offseason. And if the number of players who have one of the traits than is desired, then a certain majority of players will have their traits reversed in a manner which makes sense. If the players don't like being able to see their players' traits reversed, they have the option to turn off the feature off completely.
It's also suggested to adjust the criteria for the Breakout Dev scenario in the course of a season, to avoid the overabundance in high dev characteristics, which can aid in balancing certain leagues that have a large number of players that have these dev characteristics. In addition, they've added three additional QB breakout dev situations that may be encountered during the course of a year.
If you select the option to disable the breakout scenarios the players progress in their dev traits only based on their seasons' stats and also by their awards. However, this doesn't solve the fundamental issue that buy madden coins franchise mode experienced for years, which is that it lets players develop only through performing well in games and making it impossible for players on lower teams to never be elite, by putting them into an unending cycle.