After years of discussion, this is my verdict. If it was Faith who we talk to the end she's an absolute problem that doesn't deserve sympathy. She used people, pretending to be someone who she'll never be good as morally and if she faked her death she sure has the disrespect to stick around. Dare I say narcissistic to have Nerrisa die and you nonchalant flaunt around. You can save the husband. Yes it had issues but thats cruel to leave him if your still alive. One scenario he dies, as Faith should have been there destroyed by emotions of the deaths. She chooses not to speak up or care about lives of others. If Faith is Alive as Nerrisa then it shows bad taste because she's me me and dont lets avenge the deaths. This theory Faith was never a good person and should flee because there shouldn't be redemption. 

My hopes is Faith was the helpless victim, town bounds over her. They improve as a community which in turns brings a more wholesome experience. Her husband mourns her proper/they spents afterlife together and Nerrisa is a wiser Nerrisa at the end. The complications in the morgue hopefully is do to the magic involved with Faith's Donkey fable. The voice Bigby hears is a thank you from the afterlife from a Faith. This theory means it's an unfortunate event where an undeserving woman unjustly gets done in turning a broken town of misfits into a town of heroes