I know this is unpopular but he won't be hard to replace. He is very good. And has been exceptional this season, but I think he can be replaced.Gonna be next to impossible to replace. Not many players out there in his position who can do what he can.
I mean, Yaya was a unique specimen yet we've replaced him and played when better than we ever had. So if a player as unique as Yaya can be replaced, Dihno ( no disrespect to the great footballer he is) also can be replaced without drop off.
It will just take said player some time to fully understand the role. It took Dihno himself a whole season to get it. But it can and probably will be done in a summer or 2