Isaac created this substitute for manifold search : 

https://outsidetheasylum.blog/manifold-search/

which I and several other people found useful to use, and I even found it more helpful than the manifold's native search itself.

And you can search titles as well as descriptions.

Will Manifold end up acquiring/integrating/replacing their search with this tool?

Even if it is rolled out to a small subset of users officially, it will count. If manifold pays Isaac (mana also accepted) to acquire the code for his search tool, that will also resolve this to YES. 

If Isaac is hired by manifold and writes code for their search, that will also count.