I so feel your pain! I've been searching for a dress to wear to a wedding in June and I have much the same issues. Add to that the fact that I really don't want to wear a sheath --- I don't like sitting with my legs plastered together in a rickety reception chair all night long. Finding length and sleeves is such a bear!
I adore the pink on you --- I think it's perfect for a 5pm event, particularly in that color. I like the polka dot, and it doesn't look too short while standing, but I would try the sitting test.
And the blush jacket? Yah. I'm going to look at that one right now --- and I don't even think I can wear blush!