That's how XP10 water looks - like a sheet of blue plastic
You get some wave action down low but not much... in XP10 the world's seas and oceans are a bit of a mill pond.
To be honest FSX is only slightly better, and P3D2's water is awful. The sim with the best looking water IMHO is DCS.
I'm not so happy with the neon horizons in the shots above either. I was using Real Terra Haze plugin, I might swap it out for something else. I'm kind of liking the more subtle effect that comes with the weather engine in EFASS.
One thing XP10 can't be beaten on is night flying. It simply looks amazing with it all in motion. The fully selectable and dimmable night lighting is also a big improvement over most FSX aircraft which have a simple on/off night lighting function.