I'm also perplexed why Ryanair wouldn't consider moving to a next generation aircraft with more fuel efficient engines such as the Bombardier C series. The largest version is 149 seats which isn't small and would enable Ryanair to compete on thinner routes. A Bombardier/Ryanair deal would really make Bombardier a player in this segment of the market!
From what I've read 149seats isn't enough and wouldn't allow the company to grow. Why get rid of 200 737's that can take 180 passengers in favour of 149?