Sousa was delighted with the performance but just felt that the Swans should have added to the two-goal tally against Darren Ferguson's side.
"I think it was a complete performance, but perhaps we could score a few more goals," Sousa said after the 2-0 win at The Liberty Stadium on Saturday lunchtime.
"There was great understanding between the players and this can only go on to give us greater success in the games to come.
"The players did everything I asked and if we can carry on like this and also improve, the confidence in our own ability will come.
"We have played many good games this season but this is one of the best because of the quality we showed and I am delighted that financial circumstances at the club have meant that we are able to keep our best players.
"The team were outstanding today and it was an impressive performance."