From everything I’ve read in these forum threads, there was a huge problem with keyword based names that caused the search algorithm to be changed late last year. It looks like a lot of people who used those keyword based names have complained about a loss of sales after the search engine change. That being said, it sounds to me like you want to avoid that and just give your song an original (artistic) name, then focus on adding really accurate keyword tags to your metadata.
My understanding of search engines is that they are mainly based on your tags and item descriptions. In most cases, your title doesn’t even factor in. Perhaps Envato had titles in the search, but wised up and removed the title from consideration or reduced its weighting, hence, causing people who relied on titles to lose sales.
If I was a buyer, and I saw a search result that had 100 songs, 90 of them with the same title, I would probably ignore most of those and listen to the ones with the more artistic names first. Use of artistic names says something about the composer’s creativity versus “the others” and the music might be less boring and more original.