Cut out all the Hound stuff (which I honestly don't even remember, lol), cut out the stuff with the cave and monastery, and have her chase Sansa a couple more episodes, until she comes across The Brotherhood. Then for the very last scene of the season reveal Lady Stoneheart to condemn Brienne to death. Fin.

Since Brienne's fate is uncertain for most of Book 5 anyways, it would be a great way to "write off" Brienne for next season (or however long it would take for them to reunite her with Jaime).

I forget though... was there anything critical that happened at the cave and/or monastery? I vaguely recall there were some reveals about other characters, but nothing crucial about Brienne herself.