Results are in! THANK YOU ALL AGAIN Keeping in mind Angie's smart comment that we don't get much summer, here is what I'm going to do:
There was nearly unanimous consensus to keep #1 (blue print dress) and most people favored #5 (orange dress) so I will certainly keep both and take the green one back; I will try the wrinkle test first (thanks Heather!) to be sure the orange dress doesn't get lap wrinkles. I like that both these dresses can be layered in cooler weather as well.
General consensus to return the aqua/mustard dress. Those that noted I don't wear pastels much are right, but the colors in this dress are quite saturated which is what drew me to it. But the fit is too wonky, so it'll go back.
General consensus to return the navy top. If the fabric draped at ALL I would likely keep it, but with its serious stiffness I must take it back.
No strong feelings overall about the striped tank, but I tossed nearly all of my tanks so it does fill a hole. Will exchange for a smaller size.
Mixed feelings on the white cropped pants, more of you dislike than like them. I am going to keep them to experiment with cropped hem lengths because I don't have much experience with them, and also have no other white pants Will also likely elasticize the hems so they're more fitted. I'll be looking for white slim fit cigarette/skinny jeans though!
General consensus to keep all accessories (especially the black belt), which is great because I like them all too! I still need to test the wedges for comfort; if they pass I'll keep if not they'll go back.
Final returns: aqua dress, green dress, black pumps, navy top, striped tank (exchange). Glad to get some validation that my initial thoughts were on the right track. And now I'll have a little extra money to spend this Saturday at the meet-up 0:)