What makes a useful modern anti-piracy patrol ship?

Would the Littoral Combat Ship make a good anti-piracy platform, and what should such a ship look like?

No; a lengthened River-class-style OPV with UAV facilities and practical medium guns would trade unnecessary speed for useful patrol capability.

The Littoral Combat Ship sacrifices too much to achieve roughly 40-knot speed. A few extra knots offer little protection in a world of much faster missiles. The machinery, cost, and internal volume devoted to speed would be more useful in endurance and patrol equipment. A preferred alternative resembles a lengthened River-class offshore patrol vessel with a UAV hangar. Medium-caliber guns fore and aft and additional 30 mm weapons would support close work against small craft. The answer frames anti-piracy design as a balance of persistence, aviation, boats, and practical firepower rather than maximum sprint speed.