I have only had Nexus device till the Moto X I have now and the Nexus always has a small description of what the update offers and the version. The Moto X also does the same thing wonder why Sammy would leave that out.
That maybe true but Sammy still active developed TouchWiz not to convey the information to the end-user because it was part of Android when Google release the update to Sammy to develop TouchWiz for KitKat. Carriers don't modify the updates they just approve or deny after testing.