I think the memo they quote in the article is fake, especially coming from the Ryanair management themselves. They are trying to use it to scare the pilots into accepting the deal they were given.
Monarch operated Airbus aircraft and Virgin Airways and Aer Lingus opened fast track entry for the Monarch pilots. There are also other operators with an Airbus fleet with much better T&C than Ryanair. Why would they go to Ryanair? I just don't see it