I loved the opening credits of Godzilla (2014). But, I still would've liked some more time in the 50s, possibly exploring more of Godzilla's origins or background. So this is something I wish they would've kept from the early draft.
I also feel that it would've been better if Ford and Elle had been siblings instead of husband and wife. The whole "gotta get home to the wife and kid" motivation didn't work too well for me. I mean it was okay, just not great. But If they were siblings then maybe a deeper family connection/conflict/struggle would've worked better with their father, and possibly given Cranston a lot more screen time.
And finally, I've seen so many concept art of the mutos over the past year, and many of them I feel would've worked a lot better that what we actually got. Particularly this one:
This is actually pretty amazing! Why the heck did they change him?!