Well,,here are some suggestions
1) WHY did the catholic church do what it did? You could form your thesis around that question,,and then try to defend your opinion.
2) WHAT could have the church done differently during the revolution. Use the COULD-HAVE-BEEN argument. Support your ideas.
3) HOW did the revolution benefit the church. Was it actually a benefit/fair trade-off? Find three to five biggest changes that happened in the catholic community and explore them. Provide plenty of examples.
Hope that helps,,good luck,,