One problem you have with Easyjet is all operations are out and back crew wise, unlike BA. Thus FTL limiting operations eg Cyprus can be canx at the drop of a hat when the w/x is bad or during major slot delays. I am aware of this and having been caught out.
I rarely book with them on time limiting sectors
I dont buy at a major base like LGW that they could not use creative scheduling ie swap an earlier a/c or move a crew from their second rotation to operate the affected service, and then calling in a home standby to operate the later flight