When you say "normal vbulletin search", I'm sorry I don't know what that means. Are you referring to the search function on the upper right corner of the screen?
"Do we need it?" No, not necessarily, however I did find it useful.
For example, "mouth". Using google tool provided
threads with titles such as "dry mouth", "sore mouth", "mouth sores", etc.
Today, if I type "mouth" in current search tool, I am inclined to open maybe one of the top ten results and even that doesn't look promising.
My question related more to my worry that the tool was still available, I was just too stupid to find it.