Despite entering their first-ever continental adventure, Oliver Glasner's side are learning very quickly. Without star figures like striker Jean-Philippe Mateta and wing-back Daniel Muñoz, the London club left Dublin with a commanding win that virtually secures them a place in the Conference League playoffs.
A further victory in their upcoming match against Finland's KuPS should be enough to seal straight passage to the last 16, particularly following a previous stumble against Strasbourg.
This occasion provided a platform for several Palace's lesser-used players to impress. Christantus Uche, in only his second beginning after joining on loan from Getafe, notched the scoring with a well-taken goal. Forward Eddie Nketiah added a second, scoring for the second consecutive succession.
The Shelbourne team that had finished their domestic season were no match against a largely second-string Palace lineup. The visitors were already depleted by the reports that Mateta and Muñoz are out with knee injuries.
In spite of heavy rain in Dublin, Palace quickly established dominance. A flowing move in the 11th minute, initiated by Daichi Kamada's clever pass, let Nketiah to lay on Uche for a straightforward finish.
Youngster Adam Wharton went close soon after, fizzing a powerful effort over the bar. Nketiah subsequently appealed for a penalty after racing into the box, but the official dismissed the appeals.
Ex-Arsenal striker did not have wait long to get his goal, tapping home from a yard out after Uche's effort had hit the post.
The home side were hanging on for dear life. Full-back Kameron Ledwidge was lucky to avoid a booking for a couple of robust challenges on Yeremy Pino, before Chris Richards rattled the crossbar with a powerful header from a corner.
The contest was as good as over eight minutes before half-time. Yeremy Pino weaved past some weak challenges before calmly slotting a shot past goalkeeper Wessel Speel to make it 3-0.
Following the break, manager Oliver Glasner took the chance to rest key players like Kamada and Wharton. Replacement Romain Esse almost scoring his very first touch, only to see his effort blocked.
The youngster was desperately unlucky later on, seeing one attempt crash off both posts before being gathered on the line. Uche also blazed a sitter of a chance, indicating there is still scope for development in his game.
A solitary worry for Palace was a second-half injury to Justin Devenny, who was forced off. This paved the way for 17-year-old striker Benji Casey to earn his senior debut, rounding off an otherwise positive night for the visiting side.
Dr. Elara Voss is a tech analyst and futurist with a Ph.D. in Computer Science, specializing in emerging technologies and their societal impact.