I hope Jimmy shows up to take Fiona away
I feel like that would be the best way to write her off the show, just thinking back to the ending of season 1 when she was at the train station debating on whether or not to leave with him but she decided to stay, cause her family needed her there still. But now they're all older and don't need her anymore so she can be free to go live her own life.
I know theres alot who don't like Jimmy, but i always felt he truly loved her and he was the one for Fiona. Yeah he was a thief, a liar etc but still he always felt like Fiona's soulmate.