MOL talks a good game and we have seen backtracking before - e.g charges in both Stansted and Dublin - both increasing and decreasing capacity a couple of times, allocated seating etc.
I believe they still have ambitions of being the UK's largest airline, just to get one over on EZY - but they have a large network in Europe to fall back on, which Jet2 doesn't - so who can blame them for giving FR a run for their money.