Glad you like it!
The weather system is only partly completed at the moment, that is why there are no ‘3d’ clouds or rain yet. I have a few ideas that I am testing out in my project, but I didn’t want to include it in the download yet as it only sort of works (that’s my way of saying it is mostly broken :p).
Beyond that, the cloud textures are not great, and are tiling too much. All of the textures included in the download come from the sample projects Epic created on the marketplace, some of them look great, others like the clouds & shore foam are not so great. I will try and come up with some better looking textures for a future release.
Thanks for the suggestions! They are on my list. 