I can do the green, and I know one wants some ventilation when pursuing energetic furry characters across the city on foot... But okay, who picked this outfit anyway...
How many veils do they have on Sesame these days? I know it's all very medieval fairytale-ish, but I just have a sneaking suspicion that these days, the reference to marriage didn't help her reception. Talk about stuff that family values people try to claim as "theirs." She's singing a tune with an adult version all about fickleness and uncertainty in relationships, and doing a childish version that isn't much more trusting, while wearing what some regard as a symbol of endless sacrifice and fidelity. Combine that with:
From what I could see in Trieste's exhibit gallery, I happen to think her stage outfits actually fit her much better. Most of them also have more surface coverage up top (tight or not), but that isn't so much what I notice here. I mean, little tapered triangle points on a straight garment do not exactly "highlight" substantial bustlines so much as dangle precariously under half of them.
I'm not talking about cleavage; it's more the showing of the entire tops and hinting that one pull down the outside might just do the trick. C'mon non-con roleplayers, let's be fair and admit the clothing censors just might be following a certain logic here: Wouldn't she look quite tempting wearing that in an adult version of Labyrinth or some other monstrous pursuit scene? Although I imagine her reputation for songs about gender violations and precarious relationships had something to do with it, you can also lose a point simply for unlikely garment fit.
Not a parent; also skeptical that kids (edit: honestly well, not all kids) would think of any of this... But it isn't the Sesame target-age kids writing in and protesting.