Questions about finale in comparison to the book

Me and my husband have just finished watching the show and I've read all the books (and realised I don't remember many things), but he hasn't. We both loved it, the only thing I wasn't very happy with was the aging of the kids (because I feel like it's a lot harder to explain their stupid decisions when they're old and mature enough to be having sex), but he preferred it to the young-adult genre so I could see the merit in it. But we also felt (both of us) that they shit the bed with the finale and the mysteries/ inconsistencies/ unclarities it presented.

So he's had some questions that I wasn't able to explain and I was hoping you can help me clear things up from a book reader perspective and then maybe I can clear it up for him, even if it's just confirmation that it will (should) be later cleared up in the series and he doesn't know because he's not supposed to know yet (and not because he didn't understand something properly or the show was confusing, which it sometimes was).

So, I have a few questions:

1. why did Moiraine bring Rand to the Eye of the world if he's the only one who can release DO? Shouldn't it be easier to just kill him (Rand) and be done with it? I don't remember this idea ever being in the book, to me it seems like just a plot hole of the show. Am I missing something? 2. why did they hide Ishamael's identity? They make it seem like they want you to believe it's DO, but then they go and reveal his name in the credits. So are the viewers supposed to know he's not DO or not? Have the showrunners ever talked about this? 3. Ishamael wanted to make Rand channel into the baby girl to trick him into channeling into the seal and break it, right? And that's what the whole cuendillar bit was about, that Rand channeling broke one of the seals? God, I feel like it's been an eternity since I read the books, there's so much I don't remember anymore. 4. Is Egwene supposed to have brought Nynaeve back to life? Are there any other instances of resurection in the books aside from DO reviving his Forsaken and random people being resurected as a result of balefiring their killers from existence? Because I don't remember any.