...is a module about 1200 lines long....

If it's perl, and that is 1200 executable lines...

It's too damn big :)

Humour (hopefully) with a point. It's hard to believe that it takes 1200 lines to do any one thing in Perl, and a module ideally should do only one thing.

Breaking out a few sub-modules from the main, allows whatever documentation is included to concentrate on describing the function of that code, and not mix stuff up.