Britain got Catholic emancipation. I don't think this solved anything.
Several decades after the Union, so sentiment about the union was split from it. Catholics and the Catholic establishment in Ireland were actively supported of the Union acts until George III vetoed the emancipation part of it. It made sense: they believed the British were much more tolerant than the Irish Protestant Ascendancy, which was true. It was just George III signalled visibly the tolerance wasn't that much. Another monarch and the signal would have been reversed.