From my perspective, removing signatures is a stroke of genius. It automatically negates the majority of the people that misuse the forum in order to get signature exposure.
Discourse does allow you to have a link to your site in your profile, so theoretically people will see your posts, decide that you are knowledgeable or interesting, and check out your profile. That is how signatures are supposed to function, but they have never really worked like that.
I'd love to hear your thoughts.