Personally I think SQL::* should be for modules that are primarily about SQL (e.g. SQL::Translator and SQL::Statement which can be used to work with SQL quite apart from DBI) and may secondarily have a DBI tie-in, whereas DBIx::* is for modules (like yours) that are primarily extensions to DBI and really do not deal at all with SQL except in a DBI context. But others have long ago blurred that line so at this point, I'm not sure it makes a difference.
The main thing I suggest you aim for in your title and in your POD is a clear description of why someone would want to use this module instead of SQL::Abstract or SQL::Interp or one of the other existing alternatives. Dont denigrate the others, just give a fair comparison of where yours has strengths. Is your module to be used instead of the others or in addition to the others? If the former, why should anyone switch? If the latter, in what cases is it needed?