No. Tax is not an EU competency, which is what the whole point of this appeal was from an Irish perspective. Of course it could be made one as part of a treaty, but I don't see that France/Germany's approach to taxation is inherently better than Ireland's.

No, this isn't about Ireland only levying 12% corporate tax (which is already a beggar-thy-neighbour race to the bottom).

This is about Ireland abetting Apple (and every other large US tech and pharma firm) to not even pay the 12% but pretend that all of its EU profits were created in Bermuda, BVI or some other zero-tax offshore tax haven. (Via the Double Irish Dutch Sandwich legislation they offered until this year, or the newer and improved "Patent Box" law.)

this would probably be a solutions yes.

Getting there politically is a hard and long process.

The EU exists partially to prevent large multinational companies from playing smaller countries against each other (by having a common market).

Personally, i think european integration is necessary to keep the continent afloat in the era of globalization. Europe is a continent that is highly fractured politically, and having smaller nations is a problem against gianst like the USA and china.