The strenghened regime of Carthage, and the wealth generated from Spain might encourage poor urbanites from Greece, Anatolia, and even the Levant to sail for the western Punic Empire. If Carthage has managed to subdue the Lusitani, the Calleaci, and the Asturians, resettled Punics and Greeks on the northern and western coasts of Iberia could open up the Atlantic Celtic markets to the Mediterranean world. Maybe by the First or Second Centuries CE, the Atlantic islands of Canaries and the Azores would see limited settlement by Mediterranean peoples? Pontone ships, famously constructed by the Celtic Venetii from Brittany until their defeat by Julius Caesar, may be adopted by Greek and Punic mariners. The larger and sturdier Pontones may be the first step in the endeavor of crossing the Atlantic Ocean.
Just thought I'd bring this to your attention.