A minimal viable product is useful when you're testing a hypothesis. If you've already validated the concept for your website, then it's time to move forward with enhancing user-experience, features, design elements, etc.
Do you have a clear path of what you would like to accomplish but it is not being implemented by the developer? If it is not working out with your current developer, have you thought about working with someone else?
However, the problem you're describing with minimal traffic is probably not due to the current design of your website. Perhaps you need to add more content, focus on basic SEO (e.g. headlines, sitemaps, etc.), or use social media to interact with and promote your content to your audience.
What do you think?