TBH, I like the decision to change Isabel's hairstyle. I was actually going to ask a couple updates ago if there were any plans to let her hair down, so it was nice to see that actually happen. When you think about it, it doesn't make sense to always have someone's hair be in a ponytail or up in some way. It's not healthy for the hair to constantly have pressure on it like that, and its basically impossible that long hair would be up 24/7, even when asleep, immediately after a shower, at the pool, etc. I mean it's not like realism matters here, but it's nice to see anyway.
That said...yeah, the new model definitely does look a bit creepy in some of the angles, so I think some tweaking would be good. I think it looked better in the elite-only scene this update because (if I am remembering correctly) it was a combination of the hair being a mixture of up and down, not completely down. In general though, I do like the idea of changing hairstyles up.