If Iris was protecting Nora from someone or something that was going to kill her, then I think Iris would do that. A parent wants to protect their child--and if the child doesn't understand and ends up hating them for it, so be it--it's worth that risk. I also thought Barry siding with Iris was the right thing. Parents need to present a united front--if they don't it wrecks the marriage and doesn't help their kids in the end.
Dexter Myles has always been the curator of the Flash Museum (since way back in the '60s)--of course, if someone like Eobard Thawne took Dexter's face, I guess it's possible.
I hope all those people who hated Ralph in the previous season can just put that aside and see the character with new eyes this season. I don't think they've put a foot wrong this time around and Ralph is being written and acted so well. It would be a shame if people didn't give him another chance.