Without re-hashing the merits (there are some) and deficiencies AL, the fundamental problem with this doc is that it emerged from a dreadful institution: the ‘synod of bishops’, a creation of Paul VI (arguably the most autocratic pope in the modern age).  The very idea that bishops should serve as an ‘advisory council’ to the pope is repulsive.  It feeds into the Vatican One notion of the pope as a sort of Überbishop rather than primus inter pares.  Paul actually proposed language for Lum.Gent. that the pope was‘accountable to the Lord alone’—fortunately the Theol.Commission cut it out.

Bishops are bishops in their own right (the fact that today most of them are essentially appointed by the pope is a problem that needs to be addressed).  They are not meant to be minions of the pope—though most of them behave that way (how many had the courage to take a public stand against the Novus Ordo, even though many of them found it unbearable?  Only two that I know of.)