That last image with Mei sitting on the beach is quite hard to get right, Marc even said during a stream that he just kind of messed with it and pushed the values around, and didn't have a solid way to go backwards on it anyways.
It looks like you did a pretty good job, I think that you need to bring up the reds just a tiny bit, her legs in the sun are just a bit low on red, and the umbrella is a touch short on purple.
And the brightness might need to come up a little bit as well, you can see the difference in the light water and in the ice pack.
And man you really did make a dream house there. The water reflection is pretty pure in your base image, but if you look closely you can see that there is just a slight blurring effect on the trees that you should mimic on the building as well. Its almost like glass but there is a very faint ripple that makes the reflection look a bit jarring.
Man I want to live like that ... maybe less artistic architecture, but pretty much that.