De Boer wants to change the Palace philosophy and make them a more attractive side to watch, but the adjustment has not been smooth at the start of the Dutchman's reign.
"An away win in the Premier League is always hard, and after the start we have had it was an important game to win".
The Dutch manager believes that his south London club have shown some positives across their opening two games, despite being thumped by newly promoted Huddersfield in their first game of the season.
Another one of Palace's key men will also miss out, as Ruben Loftus-Cheek is set to spend time on the sidelines with a groin injury.
It was not the cleanest strike Abraham will ever hit, but it is a goal that will give the 19-year-old confidence in a season where Swansea will rely on him.
Swansea's goals summed up Palace's lack of defensive awareness and sturdiness in a 3-4-2-1 formation that appears to suit none of their players.More news: Leicester City - Premier League - 27 August 2017
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James Puncheon's ambitious shot was then blocked while at the other end Alfie Mawson headed wide when he had to hit the target from a corner. Swansea could be getting Fernando Llorente back in the lineup for the first team this season after he broke his arm.
Palace came out of half-time looking bright, forcing Lukasz Fabianski into a good save from Kelly inside a minute of kick-off.
The Ghanaian blocked Hennessey's attempted clearance and the ball rolled into the Palace net.
They left with two goals and three points to underline just how wretched Palace have become. Christian Benteke was isolated up front all afternoon although Palace improved after De Boer switched to a back four following Swansea's second goal.
Incumbent goalkeeper Wayne Hennessey impressed in the defeat at Anfield but, with veteran Julian Speroni the squad's only other senior shot-stopper, de Boer has identified a "long list of goalkeepers who could be suitable" for his possession-based approach. "If some of our players get injured then it gets a little bit narrow", de Boer said.