I think as a fictional manga this manga is great. I think if you think about it more realistically you might have a bad time.
Mostly I connected with this one due to the main character feeling as if a person was removed from your life not because of something you or they did, but because of reasons that were out of your control.
For different reasons it's a nice reminder that life goes on even if heartbreak happens. It's also very good from what I can see, the wife is trying to nudge the husband and her kid to move on without her. Even though emotionally it feels impossible and it feels like a bit of relief just to see her.
I hope this manga keeps going in this kind of direction and doesn't go into the direction of them getting together because that shatters all of the hard work that the manga has done thus far by building up a gentler way for the family to separate.
Grief is not a joke and something like this to peek at a little escapism and some grief counseling is nice.