I would think that the headline of an article should always be H1 if possible.

Why is K2 setting this to H2? I thought this would be bad SEO?

I know changing this would need thousands of websites to fix styling, but at some point, there should be a change...

Maybe there could be a setting that you could turn on that would revert K2 back to using H2 for those that really do not want to use H1? So with a new version, you automatically get H1, but you can change back with a setting...

Hope you understand what I mean!