Why do you like to do this? The names are replaced on export, anyway (expect the names in the Adobe glyph list).
But you could set the production name if you really need uni names in the final font for the basic letters.
No, there is no such advantage. The nice names like Acaron are recommended for most users unless you want to use your own naming scheme (for example, to interoperable with other systems that use a different naming scheme than Glyphs).