Go get you some Auto Layout goodness.

Interesting, I've never found myself needing a feature like this, but it seems like a plugin could easily satisfy this need

Anima auto layout does this…sort of

https://gfycat.com/GoldenBraveLangur

Dear Sketch, just fix the union object issues. I want to throw my laptop every time I use one.

You can send a feature request to the Sketch team here: https://www.sketchapp.com/support/contact/

I've sent a few already, though none I've seen implemented just yet.

Alternatively, you could probably create a plugin that does this for you.

1000% yes.