Lyon-Strasbourg (and Germany beyond) would be useful too. Most of the high speed line is built already anyway. I don’t know if you count them as “Paris-centric

Lyon-Strasbourg (and Germany beyond) would be useful too. Most of the high speed line is built already anyway. I don’t know if you count them as “Paris-centric” or not, but Lyon-Lille via Marne-la-Vallée, or Lyon-Nantes via Massy are important as well.