Not sure about Gilly and Little Sam 
I saw both still standing at the end of the crypt fight. Gilly has been hard for me to recognize this season, what with her new "Southern" hairstyle and real-life pregnancy during filming. And Little Sam is a toddler now, so to see him "standing" at all is always odd for me.
A few questions I had from last night's episode:
- Anybody have any speculation as to what Bran was doing with the ravens?
My take on it was he was trying to draw the Night King out by making it look like he was actively participating in the battle instead of simply acting as bait. (No idea about the other question...these budget-saving obscured battles at night leave me with the feeling if they want me to know something important is happening, they will spell it out in an obvious way.)
Seems the plot armor was a lot stronger than your typical GOT battle. I am kind of disappointed with how by-the-book the battle was and how tame the death toll was for the main cast, or even the b- and c-listers for that matter. The Dothraki charge and its outcome was the only dread-inspiring surprise.
At the same time, I remember the first time I read the scene where Jon fought the wights at Castle Black and rolling my eyes about the fact that we were going the "Zombie" route. It took me a long time to get invested in that storyline at all, but by now I had flopped and considered this to be the main point of the story, so ending with a struggle for the Iron Throne seems almost anticlimactic (even though that's where I always wanted the story to be focused.) I hope there are surprises coming.
(And after two breeches the same way, I think it's time for the Winterfell masons to invest in some giant-proof doors.)