If they were hell-bent on being outside the park
and bringing in Aaron Paul's character (he sucked btw), the best way to handle Delores would be to have her use him to bring the system crashing down; especially when she reveals the system is controlling humanity. He was not happy about that. His anger was sincere. He even doubted her motives multiple times throughout the season. He doubted her again in the final minutes, but then we got Delores' sappy montage and he was on her side again. It was about as believable as her character turn.
She would have still been the villain and Caleb joining Maeve actually makes sense. Delores would have used him to bring about the apocalypse. The crap we got instead just makes no sense.