Sandro Magister has offered his thoughts here:
As the pope's delegate, Archbishop De Paolis has full authority over everything and everyone. For Corcuera, Garza, and the other heads of the congregation founded by Marcial Maciel, the end is in sight. But they're still resisting.
In the letter of appointment dated June 16, reproduced in its entirety further below, Benedict XVI appoints Archbishop De Paolis to govern the Legion in his name "for as long as it takes" in order to remake it from scratch, with a new constitution and with an extraordinary general chapter to mark the new beginning.
But it is in the following decree, released on July 9 by the Vatican secretariat of state...that the delegate's powers are established more precisely. These powers are extremely broad, practically unlimited. The delegate has direct authority over all the superiors of the Legion at the different levels, general, provincial, local, and over all the communities and individual religious.
He can even exercise his authority on his own initiative, independent of the current constitutions of the order. Any decision, in any area, falls to him. The delegate is in charge of admissions to the novitiate, religious profession and priestly ordination, the hiring, transfer, and firing of employees, the orientation of the universities, the seminaries, and the schools.
It is the delegate who decides in matters of extraordinary administrative affairs, or the divesting of assets. In short: the delegate "has the power to intervene wherever he sees fit, including in the internal government of the institute, on all levels." It is clear that, with a delegate endowed with such powers, there is no future for the "system" that concentrated control of the Legion in the hands of the two main heirs of founder Marcial Maciel, Frs. Álvaro Corcuera and Luís Garza Medina, and with the latter even more than with the former. The end of this "system" also involves the end of that separate body, proprietary and managerial, under the total and exclusive control of Fr. Garza, which is Grupo Integer.
Grupo Integer is key to the Legion Empire, as it includes (and finances) endeavors that are hidden to most outsiders and even the bulk of the rank-and-file. Archbishop DePaolis will have to be ingenius to keep tabs on it all -- and your prayers to that effect would be most helpful.
One key passage of the decree from the secretariat of state is where it establishes that "everyone has open access to the delegate and all can deal personally with him." Since Archbishop De Paolis took his post, this is in fact what has begun to happen.
But at the same time, the fact that the previous superiors have remained in their positions is acting as a hindrance. Many priests and religious of the Legion continue to resent their paralyzing control. And they're not coming out into the open. They're staying quiet even with the delegate.
They do this at their own peril, at the risk of losing the whole enterprise. It's not over yet.