Now you probably just want to close this, because in many ways there isn't much that can be done at this stage.

But I find the hasOption method to be misleading, people often use it to check if the option has been passed on the command line, not realising that it actually checks if such an option exists.

I would like to suggest a better name, and another method that actually does what you think this one will do. But given that it would be a breaking change...