@Poopysmum75
1. For the cover, I liked it though the first thing I can think of is the grey border and the red font. These are not really a harmonizing color combo and the red font specifically gives a bit of a grim impression you know - a little bloody. Your story was quite a positive one since the it's about redemption and not revenge. So that's where I see a contradiction. Sorry for the essay, I have been involved in too many creative projects as of late so I had to do loads of research on these things :D
2. I don't think there's anything left unfinished.. whatever questions there were got revealed later on as the story progressed.
3. Epilogue - Hell Yes! The both of them were not in the same place when they got "together", however briefly. So it'd be nice to take a peek at how their relationship is like and has progressed when they are just.. a normal couple (despite their heavy past). It's like an icing on a cake :D
I hope this helps! Do let me know if I can help in anyway, I'll be more than happy to. :)