Keep or pass on? Also, if a keep do the boots work with it?

So I really like this dress, but it feels like it gaps a bit up top around the shoulder and is overly loose/stretched out on the back of it - I’ve lost some weight and it used to be more fitted. Last photo shows the back wrinkles best. Is the fit poor enough I should pass it on, or keep it? Also, do the brown boots work with it? I’ve also worn it with heels and white tennis shoes before.
I would rebuy it but can’t find it anywhere online.