The new rules on posting to Ireland happened just over 18 months ago.
Remember a time when you could view listings for "Ireland & UK"?
I see many issues above that cause anger etc etc., but eBay did make decisions based on above issues (which I won't mention in case I get banned) to completely compartmentalise all countries.
We are more aware of it here because of the size of our population. If I wnt to search on eBay now, I go to the .co.uk site and make a request for the seller to post to Ireland.
They still are unaware that the lisiting is now longer part of the .ie!!
HOWEVER: the larger upshot of this is for eBay iteslf. It is a dying company. It never worked in Asia, it is more or less dead in France, and the .co.uk market in getting smaller. Just look yourselves at listings you used to visit a year ago and see up to twenty pages of result. Go se what there is now!!
The percentages eBay and PayPal charge are criminal. You end up paying up to 15 % of sale price between listing, payment and currency conversion fees.
So to answer the OP question.
Don't worry about it. eBay is a Behemoth set to die.
How do I know? All advertiding sites have a hay day. But then they try to get smarter!!
I guess the key for them is trying to get better rather than let the status quo survive.
Look at other failure: buyandsell, adverts (gone pear shaped since the arguments left the building- that is why we all watched it), gumtree, benduunne.....
I also see the racial comment here, but I reckon they are very valid, and not necessarily pointed at anyone in particular, but rather pointed at how policies are formed in these companies that we choose to on.
That's my pennies worth.
Anyone else care to put a higher bid on that!