Who knows Bro? Perhaps he can become a legendary player for us in the next years, like how Kean and Kulu are developing into beasts as the season progresses.
Note, in the coming 12 to 18 months chiellini is gone, Mdl will be sold and bonucci will only struggle as he gets older. Rugani finding form suddenly becomes more important because let's face it, we ain't buying world class CBs anytime soon to replace them.
Our CB's don't get exposed much because they always have 5 or 6 fellow team members around them. So Rugani can do fine in this set up. Throw him in a side like Leeds and it will be what you'd expect.