Main weakness of this movie is being unfocused
They tried so hard blending two barely connected stories, one was the internal intrigues of the Gucci family (the interesting drama,) and the other being the killing of Mauirizio by Patrizia (the famous part.)
Both were connected just by a very thin bridge which was Maurizio, itlself a plain and boring character.
This resulted in the movie feeling too long, bloated and over-stuffed, but also not long enough to feel complete and satisfying at the same time.
It's basically two 1-hour and 15-minute movies stitched together into a giant 2 hours-and-a-half Franskenstein's monster.