Those would be interesting features, but it currently only operates on plain text lists, or lists with wildcards (*) which are converted into regexp (.*), or lists with CIDR suffixes (127.0.0.0/24). You can disable escaping, but list2regexp doesn't understand the individual segments of regular expressions, so the result will probably be wrong.

With that said, the library being used to handle escaping and testing the generated patterns (regexp2) does expose the syntax tree so the information is available to do interesting things with, such as what you suggest.