Here's another example of what Layout UVs does now: It was set to 6 pixels gap between shells. And some of them have huge gap between them, and some are literally touching borders. :| Why? What happened?!
I was working on my scene today, when all of sudden, Layout UV tool just stopped working properly! It does not layout UV's properly any more. Here's and example: Simple UV unwrap, all the shells are straightened and easily fit into 4k texture with texel density of 13. Now, I open Layout UV tool, click Apply... and this is…