I like Gundo, he has alot of quality and he's the only player we have who is capable of playing the playmaker role from deep (particularly as a single pivot), I think Simeone drilled it out of Rodri sadly, but his injuries had already taken away his mobility and now he's about to enter his 30's. I get the same feeling about him I did with Otamendi after the 17/18 season. Best sell now whilst you can get a decent fee before the wheels fall off completely.
I would hope the club has already sounded out a swap for Thiago and been rebuffed because it'd almost be criminal not to have tried.