Hysaj had a bad season, Ancelotti seems to prefer others to him. But he was highly rated before that, many clubs where after him.
I don't think his bad to be honest, more secure in defence then Cancelo, and quite good going forward.
Cancelo had a good first half of a season, then not so good. I think he is a little overrated to be honest, amazing going forward, fast, skillfull, lets remember he was always playing higher up in the field in Valencia before he became a RB. His defensive skills are not so good, yeah we can hope that he develops that side, but who knows if he will become better in that aspect.
If Douglas Costa was tested as a LB people would have been impressed by his offensive game to. To play RB you need to be good both going forward and in defence.
Would Hysaj be so bad? Who else is out there to get?