Despite embarking on their maiden European adventure, Oliver Glasner's side are learning at a rapid pace. Without key figures like striker Jean-Philippe Mateta and defender Daniel Muñoz, the London club departed Dublin with a comfortable win that all but secures them a spot in the Europa Conference League playoffs.
Another three points in their upcoming match against Finland's KuPS ought to be enough to secure direct entry to the knockout stages, especially after a previous setback against Strasbourg.
This occasion offered a chance for several Palace's fringe players to impress. Christantus Uche, in only his second start after joining on loan from Getafe, notched the account with a clinical finish. Forward Eddie Nketiah added a second, finding the net for the second consecutive match.
The Shelbourne side that had concluded their domestic season proved no match against a largely second-string Palace outfit. The visitors were further depleted by the reports that Mateta and Muñoz are out with leg injuries.
Despite torrential rain in Dublin, Palace quickly established dominance. A flowing passing sequence in the 11th minute, initiated by Daichi Kamada's incisive pass, allowed Nketiah to set up Uche for a simple tap-in.
Midfielder Adam Wharton went close soon after, fizzing a powerful effort over the bar. Nketiah subsequently claimed for a penalty after bursting into the box, but the referee dismissed the protests.
The formerArsenal striker didn't need to wait long to find his goal, tapping home from a yard out after Uche's shot had hit the post.
Shelbourne were clinging on desperately. Full-back Kameron Ledwidge was fortunate to avoid a booking for a couple of agricultural challenges on Yeremy Pino, before Chris Richards rattled the crossbar with a powerful header from a corner.
The contest was effectively over eight minutes before half-time. Yeremy Pino meandered past some weak challenges before coolly dispatching a shot past keeper Wessel Speel to make it 3-0.
After the break, coach Oliver Glasner took the chance to withdraw several players like Kamada and Wharton. Substitute Romain Esse came close to scoring his first touch, but saw his shot blocked.
Esse was desperately unlucky later on, seeing one shot crash off both posts before being clasped on the line. Uche then blazed a glaring chance, indicating there is still room for improvement in his game.
A solitary worry for Palace was a late knock to Justin Devenny, who was forced off. This allowed 17-year-old striker Benji Casey to make his senior debut, capping an otherwise perfect evening for the traveling side.
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