Rute, I love how picky, er, discerning you are!
Agree that the shirt dress could work - try the cami and a different color. The coral looks amazing and I do like the shape, even unbuttoned.
The cascading cardigan: I have yet to experiment with this trend myself, so I'm hard-pressed to advise, but being height-challenged myself, here goes anyway...
I am thinking that the length is too long for you, but that this look could work if it was scaled shorter, so that the back ended where the coral cardi does (showing off the curve of your lower back), and the top fold of the cascading part hit at the bustline or just above it? The drop from the bust effect you mention doesn't bug me so much, as this sense it is just too long overall?
You could also try belting this style of cardi... I don't think they're supposed to be belted (it's meant to be a lose relaxed look) BUT it could look rather cute, with a skinny belt loosely cinched, if you are a belt sorta gal. You certainly have the waist for a belt!
You really do have an amazing figure. I meant to post on one of your other threads - you were in a satiny dress that you didn't like the cap sleeves? That dress was killer (cap sleeves only subtracted a 1/2 pt for me for a 9.5 score).