Hello there, this is Dr.Chu, cardiologist. Thank you for your excellent questions which we deal with on daily basis.
To answer your questions: 1) Aspirin provides partial protection for stroke from AF but not as well as Xarelto. Therefore, with your frequent in and out of AF, I would take Xarelto for better protection;
2) What you mentioned catheterization should be catheter ablation for AF. If you are really looking for the "cure for AF" even though the success rate is not 100%, it falls in the 85-90% success rate range, the catheter ablation should be the way to go. If it is successful, you can potentially be off of flecainide and Xarelto to avoid lots of potential side effects.
Hope I have answered your questions. Please ask follow up questions if have. Please provide a positive rating for my answers if you are satisfied so that I can get credit for my service. Thanks a lot.