Regarding the issue of FR reducing their base in SNN and any potential opportunity for EI to capitalise on this - As a completely off the wall idea (not thinking of the merits or drawbacks of it).
What if EI ran a shuttle bus service from SNN to ORK to connect directly with their European Flights and market them as connecting flights (albeit by road). As other posters have pointed out (when suggesting that ORK pax can connect with EI's US services thru SNN) the road connections have improved substantially and will improve even further in the next year. At the same time (as long as ORK does not have direct nonstop TA services) EI can market direct TA conections from ORK using the back journies to SNN.
Just an idea which might be considered thinking outside the box.