OK, so pattern copying would be more appropriate. I've taken a shot at copying-without-destroying-the-original again. This was a much simpler target:
I think I have several patterns which are already pretty close to this shirt, and likely could have used any of them. But the shirt had a few details I really liked: the elastic in the casing allows for a flexible fit while also stabilizing the gathers, so no more fiddling with pillowcase dress-style straps. Also, the casing is a separate piece, so a cute lace or piping can easily be inserted along the neckline.
Small details, but then I remember the crazy-popular Oliver + S Lazy Days Skirt pattern. That ribbon hem makes all the difference between an adorable skirt and a beginner 4-H project.
Here's the outcome of my first attempt. I need to change a few small things, but overall I'm happy and a lot better at drafting armholes.
It's nap time, so I'll have to get a modelled shot later, but I'll leave you with one from the first project I sewed with this fabric. Boy, they change fast, don't they? Can't say I miss the drool.