Gabriel's talented and could surely become a star in the future. But he featured regularly in our bad run last season. We looked much more solid with the Holding and Mari partnership.
He was also player of the month for us for the first 3 months of the season, then he got injured, & struggled a bit for form & fitness afterwards. Mari only started 10 games in the league for us, so it would be madness to put him in ahead of the likes of Maguire & Lindelof, although looking at the results we did do ok when he played.
From a neutral point of view the second team that you just typed is probably right.
Arsenal fans keep choosing Sake over Rashford, but he isn't even better than Greenwood never mind Rashford.
I did say it was through a biased Arsenal fan though. I chose Saka because he's carried Arsenal at times this season, something that neither Rashford & Greenwood have had to do. I think he's more creative than the Utd 2, but the Utd lads are obviously much better finishers seeing as they are forwards really. It all depends what you want / require from the team.
I wanted to put Sancho in & play him left as I think that's his best position, so Rashford obviously wouldn't be as effective from the right. So with that logic you are talking Greenwood vs Saka, & like I said, then it becomes do you want a goalscorer or someone that's a more rounded player.