It is not yet possible to make a sure statement on whether Manchester United's performance has really improved. Manchester united have played against Everton, Bournemouth and Westham in the last few matches. Manchester United won only against Bournemouth by a large margin, it was 4-1. United failed to win against everton. The match was drawn 2 - 2. Even though the opponent was not that much strong , Though united could not win. Do they have the ability to win against big teams like City and Chelsea ? Manchester United need to try to strengthen their defense more . They have conceded goals in all three matches.
We still can't be sure whether they've truly improved. Amorim may have managed to improve their attack, as the team seems to be scoring goals in every preseason match. But their defense still looks the same as usual, conceding too easily. So, Amorim still has a job to do to fix that problem before the season actually starts.
Last season, Manchester United finished 15th, and for the new season, I'm quite confident that Manchester United won't finish as low as last season. At least, Manchester United will improve slightly. But I doubt they can compete for the title or a Champions League spot.