Even though entering their maiden continental campaign, Oliver Glasner's side are learning at a rapid pace. Without key players like striker Jean-Philippe Mateta and defender Daniel Muñoz, the London club left Dublin with a commanding win that virtually guarantees them a place in the Europa Conference League qualifying rounds.
Another three points in their next fixture against Finnish KuPS should be sufficient to secure straight passage to the last 16, especially following a previous setback against Strasbourg.
This match provided a chance for several Palace's fringe players to impress. Christantus Uche, in only his second beginning since joining on loan from Getafe, notched the scoring with a well-taken finish. Striker Eddie Nketiah contributed a another, scoring for the second game in match.
A Shelbourne team that had concluded their league season were outmatched even for a largely second-string Palace lineup. The Londoners were further depleted by the news that Mateta and Muñoz are out with leg problems.
Despite heavy rain in Dublin, Palace quickly took control. A slick move in the 11th minute, sparked by Daichi Kamada's clever pass, let Nketiah to lay on Uche for a straightforward tap-in.
Youngster Adam Wharton went close minutes later, fizzing a powerful effort over the bar. Nketiah subsequently appealed for a penalty after bursting into the area, but the official waved away the appeals.
Ex-Arsenal man didn't need to wait long to get his goal, prodding home from a yard out after Uche's effort had hit the post.
The home side were hanging on desperately. Defender Kameron Ledwidge was lucky to avoid a booking for two robust challenges on Yeremy Pino, before Chris Richards rattled the woodwork with a powerful header from a corner.
The match was as good as over eight minutes from half-time. Yeremy Pino weaved past a series of weak challenges before coolly slotting a shot past goalkeeper Wessel Speel to extend the lead to 3-0.
After the break, coach Oliver Glasner seized the opportunity to rest key players like Kamada and Wharton. Substitute Romain Esse almost scoring with his first touch, but saw his effort blocked.
The youngster was incredibly unlucky later on, seeing one attempt strike off both posts before being clasped on the line. Uche then blazed a sitter of a chance, indicating there is still scope for improvement in his game.
A solitary worry for Palace was a late injury to Justin Devenny, who limped off. This allowed 17-year-old forward Benji Casey to make his first-team debut, rounding off an otherwise perfect evening for the visiting side.
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