IMO proper investment as you describe regarding resources to ensure that games have the highest possibility of being played as fixtured needs to happen at not just one venue but at a venue in each province given the number of fixtures there are across the four codes or we are back to square one.
Granted Connacht have the Dome but the spectator capacity is limited. just look at the number of Sigerson fixtures postponed during the week and pitch inspections today at the AG and Pairc Esler for the McKenna Cup Final. Due to Climate Change is there a possibility that this could be the normal where waterlogged and frozen pitches are just to be expected on a more regular basis. I would have thought that currently the AG in Ulster, O'Moore Park in Leinster, Semple in Munster and McHale Park in Connacht would be candidates for winter proofing. Could/should be included in the Casement build. If there isn't a strategy in place for this there should most definitely be.
