The pattern hem is actually straight across the bottom but it comes out a good 6 inches longer at center front in a long curve. That giant dart seems to be the problem. I am playing around with the top on my dressform. The back on which I made a narrow back adjustment, fits perfectly.
This is what I came up with. I took out a 3" dart on either side of the dart, the one on the right is perpendicular to the center front and the one on the seft is perpendicular to the waist, stretch line. This still isn't enough but if I take it up any more there I'll no longer have the drape at the hem.
I figure that I will hem the center deeper. Only because I love this style am I willing to put so much effort into a simple knit top!
The cowl bottom top? Not willing to go the extra mile for it. It's way too long, the underarm is too low as well (they all use the same back) and as you can see, the neckline is also lower than the illustration. I added a dart to this top but it's too low and if I was going to make this I'd raise it up. But I'm not. It's just not right for me.
One thing I learned from this experience is that making a muslin for a knit is quick and easy. It took longer to trace the pattern than to sew it up. I always avoid muslins for knits because knits are so much more expensive than a bolt of muslin and they are all so different in stretch and recovery. However, I have a lot of knits in my stash that I am never going to use (this one was very thin and it wasn't expensive) that I can use them up making muslins and reduce my stash at the same time.