Here is my personal thinking.
The new system isn't bad but very unfair. Why? Because a team must have lot of money to improve his training. When a manager take a team, he hasn't much money. In that order, he won't hire the optimal trainer and the old managers (they that have already played 3 seasons or more) have bigger arenas, a better roster and so.
The will hire the level 7 coach and will make a profitable step trading. But in this moment, other people - like me - can't do that even if we win matches, with this small arena and with less supporters we won't get that level. This means that always will exist a deep difference between us.
In summary... if we hire high level trainer we can't afford players or make a big arena. The economy will be very affected by this measure... Remember that the BB's reduced the incomes in teams...
Sorry for my english!