I think Ten Hag should look for a right wing striker and a central midfielder to support Ronaldo's game, he is like a dragon playing with worms if Ten Hag still has hopes for Ronaldo. Of course it will not be easy for Ronaldo to bring his team as it used to be when he was young considering that his current age of 37 years will certainly greatly affect his playing performance, Manchester United's management may prepare funds to bring in new players who are more competent and potential in every part of Manchester's formation. United, as you said "Manchester United have to bring in new players" or even change the coach.
Man United don't need an additional winger because they already have potential young players. This was no longer a matter of Ronaldo or the winger. At the moment Erik Ten Hag is always trying to experiment with every line and it is clear that the 2 goals in the first half against Aston Villa were errors by the Benfica defender. He was too focused on guarding the transfer players who had been prepared by Unai Emery and moreover Lindelof was always unable to compete to secure the ball. So that makes Martinez have to cover up his mistakes at the back.
Aston Villas goals were quite perfect frankly speaking and Baily doesn't score that goal from that angle 100% of the time. Then the freekick and only that one lucky goal for Manchester United. That is what I think shouldn't happen. Manchester didn't fight back as a great team would do. They didn't get their organisation right and weren't sufficiently dangerous in Aston Villas box despite having amazing players in their offensive lines. Aston Villa was greatly prepared and they delivered a real fight. That's why in the end the three points were well deserved.