Why would Ronaldo become a middlefielder when his strenghts are scoring the goals or being in the box? Why didn't you go further down on the pitch and suggest him being CB then while you're at it? Put Dybala on the box then waiting those crosses etc? Are you out of your mind? Dybala as a false 9 is the only and best option for him if you want to get goals from him and im completely fine him doing that, but what does it have to do with Ronaldo since he's LW and secondary CF? They were linking up quite nicely this season.
Also Higuain can say whatever he wants to, but before he says anything he should make sure he's in shape to play football. Does he expect being a starter, while being out of shape and then having everything served on a silver platter? We clearly saw him not giving everything last night, not even 50% and that's one of the reasons why we're out.
Ronaldo is a LW, he plays on the left and who spends majority of his time in the box where he's good at. He has started games as a CF, he has played on the right at the times and plays all the roles up there, just so team would benefit from it. If all the players could do the same, Douglas Costa would play as a CF at the times, Dybala would be LW at the times, Higuain would be RW at the times but guess what? They ain't, because they really can't. Statistically it's best to play Ronaldo on LW and statistically when you have Ronaldo in your team, you're winning way more championships than with any other player as well, so why wouldn't you do it?