One often fails to get the desired results in a theological search because the term one is looking for is modern usage, not the word used in the older resources. I recently made this point on a forum request on atonement but I had to go outside Logos and use the Google N-gram viewer. I doubt that the average Logos/Verbum user would know what an N-gram viewer was and that Google had a free one. I would like Logos to build a specialized N-gram viewer (they show word use frequency over time) that considers only the books available in Logos/Verbum alongside a theological "thesaurus" to suggest what other terms have been used over time. This allow the user to know what words to look for before "atonement" (for example) became a common term for the concept. While this may look like an "advanced" tool, its purpose is to help the non-seminary-educated find the right words to search for in their earlier resources.