I can't agree more strongly here. I elsewhere argue for a website change; this is even a better idea because it'll even more clearly show the difference. And hey--maybe all of us are wrong and the academic minimalist look is more profitable? If this is true, please come back and report it--maybe we're all wrong!
But unless your customer demographics are vastly different than those of many of the people here who earn good money with proven UI techniques, I'd bet you could do better with different marketing (website, etc.). But you don't really have to bet. What'll it cost you, 10 bucks for a domain name and some time? The first rounds don't really even need a designer, though you'll save some time if you procure one now instead of later.
Test, test, test. There are a good number of qualified people (not me) that are giving good advice, but your test results are king. Start running variations, and you and HN can look at the data and start making progress.