Yay! It's coming up soon
Yeah, your DH is right- I saw plenty of women with bare shoulders/legs, particularly in the touristy areas (e.g. malls). You might get some looks if you walk around with bare shoulders, but I can't imagine anyone will say anything. To be honest though, I found that even if I'd walked around outside in my bathing suit, I would still have been stinking hot. If you're like me, you won't want to be outside or in non air-conditioned places for more than 5 minutes. So that's how I found wearing conservative clothing tolerable.
Regarding open toe shoes, not sure about that. Everywhere we went, everyone was wearing sandals. I don't think it's an issue.
There seems to be a bit of a double standard in Dubai when it comes to PDA. We saw absolutely NO foreigners displaying affection, but we did see 2-3 Emirati couples holding hands! Definitely no hugging or kissing though. Sorry
You might have to wait until you're alone with your DH!