What do you think of my weekend styling of this boys' blazer that I borrowed from my son?

1) Wore to dd's 9th birthday party at the roller rink. I needed layers in case it was warm at the venue. I like to scrunch my sleeves anyways, so it didn't matter that the sleeves were too short or the fact that I couldn't close the jacket. Added short necklace to divert the eyes away from the needed scrunch and open styling. LOL! Jacket is black and I added a navy with white floral pocket square.

2) Wore to church. I originally tried my cropped black blazer with a nipped waist, but It didn't look right. So I reached for the boys' blazer again.

Questions:
1) Does a straight style blazer suit my IT shape?
2) Does this blazer look fine with the shape of the dress?
3) I'm thinking of getting rid of this knit blush dress. See #3 for the ways I've worn it in the past. Keep or donate?

I really appreciate you stopping by to help me out.

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