Nearly 4K seats a week between Cork and Paris in Winter was just too damaging to yield. Last Winter both AF and EI dropped back to 5x weekly and then AF blinked first.
That amount is fine in summer. With this announcement, it will be up over 5K, which doesn't look all that sustainable. However, it could be a sign that AF will test EI's resolve on the route.
It's worth remembering that none of the flights are getting any kind of start up deal as EI are too long established on the route and the promotions don't apply to a new carrier on a pre-existing route.
What's really not needed is for Ryanair to get involved with a route from Cork (or anywhere else in Munster for that matter) to Beauvais, so that is probably inevitable.
Both the Shannon announcement and this one are good news as they will both bring strong inbound tourism flows, while the AF one also makes CDG a really viable transfer option from Cork. Definitely better than yet another rotation to Lanzarote, which seems to be getting as frequent as the bus to the city centre.