I've done quite a bit of paper piecing, but don't think any of these blocks really need to be done that way. I would probably use use templates and go that route, but I'd over size and trim down as I sewed.
When I do paper piece, I always trim and fully remove the paper before joining any sections.
I've printed a few of these out, but can not get them to print the correct size no matter what I try. I figure the only way I'll get them all to end up the same size is if I draft them myself. But at least they are very simple blocks so that would not be hard.