With the wing back, its more the intensity of the role that the amount of running, I would bet Riccy didn't to a lot of sprinting last season as it wasn't required for example.
Vestergaard is injured, even if he wasn't Okoli has come in and been superb if he was fit would you have him over either of the current starting CBs? Winks has been poor this season so far, I said to friends leaving the Everton game he could be dropped soon for Skipp, Winks wasn't good at Arsenal and was dropped for the next game I think its as simple as that, people are looking for a scandal that isn't there.
There are footballing reasons for the decisions that have been taken, a lot of people don't agree which is fine but the bullshit about player bust ups with the manager being made up to try and turn other fans against the manager is pathetic.