The main user complaint is the uselessness of vb4's search function. My users often wish to search for answers to their technical questions. Everyone benefits if they can find high quality answers easily. Duplicate conversation are avoided, I and others spend less time answering questions over and over, and most importantly, people building DIY electronic projects can get the technical info and answers they need quickly!
The problem is a lack of useful ordering or ranking of vb4's search results. Common keywords return hundreds of threads. The few threads with really great answers and info are lost in a sea of low-value casual conversation. vb4's search seems to order the results randomly. Even determined users quickly tire of page after page of low value threads in random order.
Compare with Google, where the first 5 results are almost always the highest quality pages! Google and Bing and others pretty much define what people expect from search. vBulletin4 falls far short, with virtually worthless needle-in-haystack results.
My hope is for search results to be ordered by factors that suggest the quality of the threads, like the number of people who have "liked" the posts, or the presence of links from other threads (a very strong indication the thread with the link is a low value duplicate and the one targeted is a high quality answer), or the number of views, etc.
Can XenForo help?