Each system has its advantages and disadvantages and while this United team was used to playing in a 3-4-3 system, there are still issues that come with using this shape.
Having Garnacho and Fernandes play inside worked in an attacking sense, but meant that Ipswich's full-backs could get up the pitch very easily and double up with their wingers, allowing them to overload on the flanks.
The other problem with this formation is that it requires the two central midfielders to cover a wide area, especially in a league as demanding as the Premier League.
Casemiro and Christian Eriksen have had their work cut out for them, and one could argue that the athleticism required is not their strongest attribute. Ipswich played well and made things difficult for them by dragging them everywhere.
To play this role well, United's midfielders also need to be more than just mobile. They both need to love the defensive side of the game and be able to spot danger and then be quick enough to stop it.
In the long term I think Manuel Ugarte will be one of them. He needs a number of games to get fit again, but we've already seen glimpses of his performance, for example in the Europa League against Fenerbahce last month, and he's also had great success before under Amorim at Sporting.
What Ugarte will have at his side will likely be someone who is not currently at the club. There needs to be some activity in the next few transfer windows to ensure they get the type of player Amorim needs.
Until that happens, United will always find it difficult without the ball, but this team will continue to develop and so will Amorim's tactics.
As I said on MOTD2, I would be surprised if United were still playing the same 3-4-3 system in a year, because the Premier League is very different from continental leagues.
If United want to improve and compete for the title I think Amorim's formation will evolve into something different, but in the meantime at least their fans have already seen some progress.
Danny Murphy spoke to BBC Sport's Chris Bevan.
