I’m not sure.

If they abolished the Senate, we would need more legislative debate from our TDs.

If they reduced the number of TDs, we would need to increase the powers of our Councils.

Centralised planning and legislating does warrant the need for the Senate, people that can discuss the bills of the Dáil being independent from the electorate.

If Ireland was greater, both geographically and demographically, we could abolish the Senate and “federalise” planning and legislation to the Councils.

I think this “federalisation” could be comparable to the US, Germany or Switzerland. The sitting Senate’s role wouldn’t be as important as laws wouldn’t be required to be adopted across the entire State.