Jamie, you cannot compare two operations an their ability to operate all flights to every destination.
EI have a comparatively small operation into Poland as compared to FRs. Poland equally experienced some fairly poor weather which caused extensive delays (I know - I experienced these first hand). There will have obviously been an operational consideration - slot times, deicing availability, aircraft rotation for later sectors. I'm not suggesting FR should be supported for every decision that they make, however I'm wise enough to know that they don't decide to operate a flight and therefore cancel another because it is more important to get a couple of Paddys down to Lanzarote for Xmas