Manchester United could be better in their defence, but they still haven't found a formula to sharpen their attack. 2 goals or more is a difficult number to score because it is certain that Real Sociedad will maintain their current position. Manchester United's midfield will be very influential in this match, because if they can't play well it will be difficult for Manchester United to flow the ball into the opposing defense to create chances.
Agree with you, Manchester United's team is much improved now than before. They performed very poorly a few days ago, but now there is a lot of balance in their team. They are playing organized football now, while Ronaldo has returned to some form but the team is not improving for him.
In last few matches now Manchester United is settled, and their unit is doing good work which is giving them positive results even it's still a big challenge for them to defeat Real Sociedad by margin of 2+ goals because this match is going to play in Spain which is surely a difficult place but if they play with strong strategy then there is no doubt they can achieve good result and stand at the top of the group.
Even right now they are having more concentrate on Premier League instead of this cup because they are struggling and now competition is not easy for any team to achieve higher rank, so hopefully they will be able to achieve their targeted results.