I could have put them together but you see, some of them like only one of them and some like all, for those who like only some of them, it is not worth to include all the themes in one package itself, so I decided to release them differently.
True what you say, but it gives people more choices in 1 file.
Also, it saves space here on DA, and makes this visual style section easier to browse. Imagine if everybody did the same for their color variations. We'd have a gazillion files.