I honestly had no idea what anyone was talking about with regards to crashes after the update.
Today I tried to go after a "15 couples dancing" Objective and have had continuous crashes (every 5-15 seconds) since.
I'm currently on about my 13th 17th crash in less than 6 10 minutes (reload time accounts for the remainder of the time).
The only things that have changed for me are:
1) Greater than zero dwellers in living quarters
2) Couples dancing
3) Couples getting pregnant [This is actually when it all started--I was aiming for 0 pregnancies and around 6 or 7th dance one of the couples just couldn't wait]
4) Zooming between the 2D and 3D view a lot more than usual. 99% of the time I'm in full zoom-out 2D mode...I only zoom in for Deathclaws and to pick up Raider loot.
The crash generally occurs when I try to collect resources.*
* Since I can't collect resources, my reserve bars are dropping precipitously, or I would just stop clicking them.
[Note: I'm on an iPad 4/Retina running iOS 9.1]