Ryanair is long past having exhausted any credability with Airbus. They grew tired of offering very competitive terms and conditions, only to find MoL using that to put pressure on Boeing; there was never any intention of ordering from Airbus.
It was the same with British Airways, or "Boeing Always" as they were known. Before they ordered the A320 they actually had to go to Toulouse and persuade Airbus that they were serious and not simply using them to get a better price from Boeing. Easier done when operating a diverse range of aircraft rather than a single type fleet.