My idea is to allow you to fully exclude authors/topics/boards, making the results more precise (including the number of results). Right now the ninjastic.space "ignore topic" button only hides the results from the list, but they are still returned.
That would be a game changer.
Even older Ninjastic website gives better search results than all alternatives I tried so far.
Biggest issues I had with search is when I include more than one word, this was giving me a lot of mixed incorrect results.
Maybe you could add a bit more information on user profiles, like DT status, or indicator if account is banned.