Firstly: this packer, as its name suggests, is a packer, not explicitly an obfuscator. There is a big difference. The packer helps reduce the size of some code, by stripping out blanks and comments, and happens to make the resulting source difficult to read, but it does not alter the symbol names. An obfuscator would indeed help in deflating the source, but it would more particularly mangle the names of variables and functions. Besides, an obfuscator needs some smart input, in order to work properly: the developer must specify the external symbols (the names of the variables and functions that must not be changed because they are accessed from outside the obfuscated script).