I just checked - it seems that sleeves and a high neckline are normal for a Jewish wedding so perhaps that is the reason for the dress choice.
btw, I hate these photos from someone creeping around in a tree to spy on the (private) wedding. I'd feel sick and frightened if this happened at mine.
I agree so much on the creeper photos - I dunno, I feel like if celebrities want some privacy, they should get it, though - especially for something as personal as a wedding.
As for the dress, I think it would be simple and lovely if the sleeves were made out of the stretch mesh that fits closer to the body. It's only that which bothers me, I guess it makes it look less sophisticated. Mind you, I use that stuff all the time for skating dresses, so it's the aesthtic I'm used to.