Simplicity 6580: moving on (for now)

Ok, so after Muslin #3, I've decided that I'm going to let go of this one (for now). Muslin #3, which I made in actual muslin fabric, still has lots of fitting problems, if not more than the previous one. I won't go into the details of what I modified, but I probably did it wrong. Plus the fabric is much stiffer and has no strech, while the previous one was drapier and stretchy, which ultimately means that I don't know where to go from here.

Obviously I could try a fourth muslin based on the fit of this recent one but frankly, at this point, if I'm going to spend another 4 hours sewing, I'd like to end up with something I'm actually going to wear.
Sooo, I've decided to put that one on the side for now and do something else, and maybe come back to it later with fresher eyes (and fresher mojo) and try it again.

Having updated my "sewing log" for the spring, and with all my recent pattern and fabric acquisitions I'm certainly note short of potential projects, not to mention a couple refashion ideas for which I've been collecting inspiration on my Pinterest board.

So what's up next ? Something easy that won't require complicated fitting adjustments and a lot of detailed work...