Looking at the article in the Donny Free Press, you get the impression it's the UK to the sun flights that are cancelled, not Wizz's core market to Eastern Europe. Perhaps going head to head with Jet2s core business was not great, especially as the Jet2 holiday product is highly regarded. It also says that the cancelling of the DSA flights will give it more resilience at other bases, this may well be the prime reason. Of course it's always easier to blame someone else, they must have a copy of the O'Leary playbook!