It's not that easy if you want European integration and support the idea of "freedom of settlement" also for companies, which to me makes sense and it is known that some countries try to pull companies to register in their legislation with sometimes improper means. I would prefer to focus on Irish taxation, which extracts value produced elsewhere to Irish benefit.

Workers rights are being unified, but that's a long complex process, as work cultures vary a lot and most companies fear German-style code termination, while it's an uphill battle to weaken it in Germany, thus it remains in national law's responsibility.

And to be clear:

a) works council exists with all normal rights, only they don't have board seats, which can be quite powerful, especially in public companies where one might form alliances with independent share holders. In the case here it's a 100% subsidiary of an American corporation, so they get their will one way or the other, board members may only delay

b) I am somewhat priviligedge as I am no simply replicable conveyor belt worker, but somewhat specialized engineer

c) I'm currently on garden leave period after 18 years in the company (incl acquisitions) due to a reduction, where works council produced a quite nice exit for me, so the only time I needed it, it worked well. But then I am somewhat privileged over others, making it hard to generalize.