Angie, so interesting! OK, so I'm glad to see that I wasn't barking up the wrong tree with these items and that returning them without question was not the right answer.
On the mint sweater: I think maybe I would be more enthusiastic about it if I actually styled it instead of pulling it on over my sweatpants. The L is too long and too baggy in the body, but I guess the fit of the hem on the M made me pause. I'll give it another try with some styling before I decide for sure.
I do still like the trench-tunic. I think that is the right way to think about this piece. I wouldn't wear it as a dress, and it's not really outerwear -- it's a completer piece, capable of functioning much like my black BCBG jacket, but in a romantic, unstructured fashion (unlike the strict structured vibe of the BCBG jacket). You're right, Angie, I *do* like to balance the rocker with pieces that are flowy and sensuous, but it's not always easy to make them play well with my figure (they seem to work so much better on straighter figures as they so often hang nicely from broad shoulders and skim the hips). I may go back and buy the trench-tunic and try styling and photographing it at home before writing it off.
OK, back to work for now. I'll ponder it more. Thank you!