The tax loopholes were closed years ago. All this will do is allow the Irish to cash in on their position without any blowback from the multinationals. Whom have already set up their operations in the country and basixally fund the countries new sovereign wealth fund.
I doubt Ireland has anything to worry about for decades. Since Brexit they are the ONLY highly educated and native english speaking country in the EU and are eating the UKs business being the link between EU and America. Their young educated youth are running most of the EUs tech companies now and the future of the world is tech.